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I moved your question to the trash. It doesn't make any sense. If you key in your algebra problem correctly, I will help you solve it.
You need to re-write your question with the correct notation. Do you mean this:
(-6y)-(12y)*(7-4y)? The way you wrote it out doesnt make sense.
is it y to the power of 4 or 4y.? doesn't make any sense..
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∙ 14y ago
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Solving -2x 3y14 and x 2y7 with substitution?
-2x+3y+14 and x+2y+7 1. x+2y+7=0 2. x= -2y-7 3. (substitute new equation in for x) -2(-2y-7)+3y+14=0 4. (distribute) 4y+14+3y+14=0 5. (combine like terms) 7y+28=0 6. (subtract 28) 7y= -28 7. (28 divided by 7 to solve for y) y= -4 8. (substitute -4 value for y) x+2(-4)+7 9. (solve for x value) x-8+7 x-1=0 x=1 10. (answer check) -2(1)+3(-4)+14= 0 (1)+2(-4)+7=0
Solve the following system of equations x plus 2y -6 equals z 3y-2z equals 7 4 plus 3x equals 2y -5z?
x+2y-6=z -z -z x+2y-z-6=0 +6 +6 ---------> x+2y-z=6 3y-2z=7 ---------> 0x+3y-2z=7 4+3x=2y-5z -3x -3x ---------> -3x+2y-5z=4 Put them into a matrix, for x,y,z and their answers. Solve for [A]-1[B], and the answer comes to: x= 1.75, y= 1.5, and z= -1.25
What is 9y plus 4 equals 2y plus 25?
9Y + 4 = 2Y + 25 subtract 2Y from both sides 7Y + 4 = 25 subtract 4 from both sides 7Y = 21 divide both sides integers by 7 (7/7)Y = 21/7 Y = 3 -----------------check in original equation 9(3) + 4 = 2(3) + 25 27 + 4 = 6 + 25 31 = 31 ---------------checks
How do you factorise 14xy-21x plus 7?
(7x+2)(2y-1)
How do you solve algebraically the system of equations?
You can solve a system of equations using a few methods: elemination and subsitution. In the elemination method you would multiply each of your equations by a factor that would cause one of the variables to be eleminated. ex: If you had 2x-3y=5 and 3x+6y=4 you would multiply the first equation by a factor of 2 (distributing the 2 to each term), giving you a new equation of 4x-6y=10. Now your y terms would cancel. You line up the equations like: 3x+6y=4 4x-6y=10 you simply cancel the y terms and add the others giving you: 7x=14 you then solve for x (in this case divide by 7) x=2 now you plug in x=2 into one of the first equations and solve 3x+6y=4 3(2)+6y=4 plug in x 6+6y=4 multiply 6y=-2 add like terms y=-1/3 solve for y To solve using the subsitution method you would take an equation and solve for one variable then plug that into the other equation. ex. (using the same equations as before) 2x-3y=5 2x=3y+5 x=(3/2)y+(5/2) 3x+6y=4 3((3/2)y+(5/2))+6y=4 plug in for x (9/2)y+(15/2)+6y=4 distribute the 3 (21/2)y=(-7/2) add like terms y=(-1/3) solve for y you would then plug in y and solve for x 2x-3(-1/3)=5 2x+1=5 2x=4 x=2 Hope this helps!
What is 10y equals 2y-6y plus 7?
10y = 2y - 6y + 7 10y =-4y + 7 10y +4y = 7 14y = 7 y = 1/2 = .5
What are the solutions to the simultaneous equations of 3x plus 2y equals 5 and x plus 2y equals 7?
x = 7 - 2y 3x = 21 - 6y 21 - 6y + 2y = 5 21 - 4y = 5 21 - 16 = 5 4y = 16 y = 4 x + 8 = 7 x = -1 Check it. -3 + 8 = 5 -1 + 8 = 7 It checks.
7x 2y 16 21x 6y 24?
7x+2y=16 21x+6y=24 y=8-(7/2)x y=4-(7/2)x 0= 4 the system has no rational solution.
X - 2y equals 1 3x plus y equals -4?
x-2y=1 => x=2y+1 (1) 3x+y=-4 (2) sub (1) into (2) 3(2y+1)+y=-4 6y+3+y = -4 7y+3 = -4 7y = -7 y = -1 sub back into (1) x = 2(-1)+1 x = -2+1 x = -1
4y-7 plus 2y equals 24-1?
To solve the equation, we need to combine like terms on both sides. On the left side, 4y + 2y can be simplified to 6y. On the right side, 24 - 1 simplifies to 23. Therefore, the equation can be written as 6y - 7 = 23.
What are the factors of 2y2-2y-4?
2y2-2y-4 = (2y-4)(y+1) when factored
Proof every number '3x'can be expressed by adding or subtracting 4 perfect cubes?
7
5xy 4x 9y-5y 6y 6xy?
xy(7+2y-3x)-6xy
2x - 3y equals -4 and 3x plus 2y equals 33 find the values of x and y?
2x - 3y = -4 3x + 2y = 33 Eqn(1)*2: 4x - 6y = -8 Eqn(2)*3: 9x + 6y = 99 Add the eqns: 13x = 91 so that x = 7 Substitute in eqn1: 14 - 3y = -4 so that 18 = 3y or y = 6 SOLUTION: x = 7, y = 6
3y-x equals 0 and 2x plus 2y equals 7?
Multiply First equation by 2: 6y - 2x = 0Add second equation to this: 6y - 2x + 2x + 2y = 0 + 7Simplify: 8y = 7 so y = 0.875 and x = 2.625
If 6 times y minus 1 plus 8 equals 32 what is y?
6y-1+8=32 y=4 1/6 Here's the steps- 6y-1+8=32 6y+7=32 6y=25 y=4 1/6
Three examples of system of linear equation?
1. x + 2y = 5 3x + 6y = 10 2. x + y + z = 50 2x + 5y = 8z = 4 6x + 7y + 9z = 7 3. x + 2y = 5 1.2x + y = 10
