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2x + 6y = 9
3x - 12y = 15
Chose the second equation because you can simplify it.
3x - 12y = 15 divide by 3 to both sides
x - 4y = 5 add 4y to both sides
x = 4y + 5
Replace 4y + 5 for x to the first equation.
2x + 6y = 9
2(4y + 5) + 6y = 9
8y + 10 + 6y = 9
14y = -1
y = -1/14
x = 4y + 5
x = 4(-1/14) + 5
x = -2/7 + 5
x = -2/7 + 35/7
x = 33/7
What else can I help you with?
What is x squared minus 2x plus 5 equals 0?
It is a quadratic equation with one unknown variable, x which has no real roots.
How do you solve 5t equals 25?
In the equation 5t = 25, t is simply a variable that you are solving for. You can replace "t" with a variable you are more comfortable with, such as "x", leaving you with 5x = 25. The equation means: 5 times what equals 25? To get this, you would divide both sides of the equation by 5, leaving it as (5t)/5 = 25/5. The 5 on in the denominator and numerator on the left side of the equation would cancel out, leaving you with t = 25/5, which you can simplify to t = 5.
What is a multi step equation that equals 13?
13
Which property of equality justifies the statement If y plus 7 equals 9 then y equals 2?
Substitution property.
What is the expression for x equals 3 and y equals 6?
A mathematical expression in its' most simplistic form, merely assigns a value to a variable. Don't confuse an expression with an equation. An equation requires a solution. An expression cannot be "solved". It only allows you to determine the value of a variable. This is the expression in words "x is equal to 3" (X is the variable which is equal to the constant number 3) This is the expression in numbers "x=3" The expression in words "y is equal to 6" (Y is the variable which is equal to the constant number 6) The expression in numbers is "y=6" I hope you understand now.
What is the variable in the equation 12k equals 20?
k is the variable.
What is the variable in the equation 60 equals what times 15?
"Wat" is the variable.
Why do you isolate the variable on one side the the equation when solving a linear equation?
Isolating a single variable in terms of the rest of the equation provides a solution to that variable. That is, if you know the equation that equals the variable, then you can figure out its value.
What is substitution of 4x-3y equals 1 x-2y equals 4?
To solve this system of equations using substitution, we can isolate one variable in one equation and substitute it into the other equation. From the second equation, we can express x in terms of y as x = 4 + 2y. Then, substitute this expression for x into the first equation: 4(4 + 2y) - 3y = 1. Simplify this equation to solve for y. Once you find the value of y, substitute it back into x = 4 + 2y to find the corresponding value of x.
What variable represents specific heat in the equation Q equals mcT?
The variable c
What is the variable in the equation 60 equals what times fifteen?
15x = 60 The variable is x.
What is the variable in the equation 2a-6 equals 22?
14!!
Solve the equation by substitution method x-y equals 5?
x+y=5
What 4x y14 and 2x y8 solve using substitution?
You cant solve it unless it is an equation. To be an equation it must have an equals sign.
What is the variable in this equation 7y plus 10 equals -6 plus 14?
y is the variable
Solve using substitution x minus y equals 2 and x plus y equals -4?
-2
What is x plus 3 equals 8?
It is an equation in one variable.
