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Systems of equations don't equal numbers.

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โˆ™ 2011-01-30 02:32:32
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Q: What is a system of equations that equals -3 and 7?
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X plus 3y equals -7 -x plus 2y equals -8?

are you talking about a system of equations where x+3y=-7 -x+2y=-8 if so, then the answer is {2,-3}


What is the correct classification of this system of equations -2x plus y equals 7 3y equals 6x plus 4?

Inconsistent linear equations in two variables.


Solve by substitution y equals -4x - 7 and y equals 3x?

The easiest way to solve this system of equations is to solve for a variable in one of the equations. In the second equation, y = 3x. This can be substituted into the first equation: y = -4x - 7; 3x = = -4x - 7; 7x = -7; x = -1. Since we have determined that x equals -1, we can then substitute -1 into either equation to find our corresponding y-value. Thus: y = 3x; y = 3(-1) y = -3. Thus, the solution to this system of equations is (-1, -3).


What is the solution of this system 3x plus 4y equals 5 x-4y equals 7?

Add the two equations and get 4x = 12 so x = 3 and y = -1


What are the solutions to the equations 3x -5y equals 16 and xy equals 7?

Equations: 3x-5y = 16 and xy = 7 Solutions: (7, 1) and (-5/3, -21/5)


How do you solve -3x plus y equals 7 and 5x plus 2y equals 3?

A system of equations? Try elimination. - 2(-3X + Y = 7) 5X + 2Y = 3 6X - 2Y = - 14 5X + 2Y = 3 --------------------------add 11X = - 11 X = - 1 ------------Put back in equation to solve for Y - 3(-1) + Y = 7 3 + Y = 7 Y = 4 -------------check both equations - 3(-1) + 4 = 7 3 + 4 = 7 top checks 5(-1) + 2(4) = 3 - 5 + 8 = 3 both equations check and the system is consistent


Simultaneous equations y-3x equals 7 2y-7x equals 17?

x = -3 y = -2


What is the solution of the system of linear equations x equals 5 y equals -2?

7


Solve this system x - y equals 8 2x plus y equals 7?

Add the two equations: 3x = 15 Divide by 3: x = 5, making y = -3. Job done.


What is the answer to the systems of equations x minus y equals 10 x plus y equals 4?

X - Y = 10 X + Y = 4 -------------------+ ( add them ) 2X = 14 X = 7 ----------find Y in one of the equations; top looks good 7 - Y = 10 - Y = 3 Y = - 3 ---------------check both equations for consistency 7 - (- 3) = 10 7 + 3 = 10 10 = 10 ------------checks in top 7 + (- 3) = 4 7 - 3 = 4 4 = 4 ------------checks and is consistent (7, - 3) ( the answer )


What type of system is 3x plus 2y equals 7 and -4x-3y equals 10?

They are simultaneous equations and their solutions are x = 41 and y = -58


What is o plus 7 equals 22 equal in equations?

15+7=22


Solving equations with variables on each side 7c-7 equals 4c plus 17?

1 and 3/4


How would i Solve the system x plus y equals 9comma -3 equals 2x - y?

Rearrange the second equation to read 2x - y = -3Add the two equations: 3x = 6:Divide by 3: x = 2 so y = 7


What are the points of intersection between the equations of 3x -5y equals 16 and xy equals 7?

If 3x -5y = 16 and xy = 7 then by combining both equations into a single quadratic equation and solving it then the points of intersection are at (-5/3, -21/5) and (7, 1)


How are math expressions and math equations different?

Math equations have an equals sign such as: 7+5=12 or 9x6=47+7 Math expressions do not have a equals sign such as: 43-27 or 8x40


How do you solve this problem it just says solve x2 plus 3y equals 7 3x plus y2 equals 3?

x2 + 3y = 7 3x + y2 = 3 3y = x2 + 7 y2 = -3x + 3 y = x2/3 + 7/3 y = ± √(-3x + 3) If you draw the graphs of y = x2/3 + 7/3 and y = ± √(-3x + 3) in a graphing calculator, you will see that they don't intersect, so that the system of the given equations has not a solution.


What is the answer to solving equations containing integers B -7 equals 1?

6


What is 6x plus 7 is an equation or expression?

Expression. Equations have equals signs.


Solve the system of equations -x minus 3y equals -4 and 3x plus 5y equals 16?

If: -x-3y = -4 and 3x+5y = 16 Then: x = 7 and y = -1


What is3 x-4 is an expression or equation?

7


What are equations that have letters and fractions?

Equations that have letters are just called equations, but there are types 1, 2, 3, 4 and ratio type equations. Ratio type equations are the ones where it is a fraction on both sides of the equals sign. Equation (Type 2): x+1-5=12 Ratio Type Equation: 21/7=42-x/3


How do you do y equals 2x plus 3 and y equals 3x plus 1?

Both equations are equal and so: 3x+1 = 2x+3 3x-2x = 3-1 x = 2 and by substituting y = 7


How do you do the elimination method for 4x plus y equals 7 and 2x-3y equals -7?

We have the given equations 4x+y=7 2x-3y=-7 First we want to make it so that we have a variable with the same coefficient in both equations. We will use the x. so we have 4x+y=7 and 2x-3y=-7. We can multiply or divide both sides of either equation by the same number without changing the equation, so we will take 2x-3y=-7 times 2 2(2x-3y)=2(-7) distribute 4x-6y=14 now we can use elimination. 4x+y=7 -(4x-6y=-14) 7y=21 divide by 7 7y/7= 21/7 y=3 Now we plug 3 into one of the original equations. 4x+3=7 subtract 4x+3-3=7 -3 4x=4 divide 4x/4= 4/4 x=1 so, the solution to our system of equations is (1,3)


3-3 plus 7 equals?

7.