Select the correct answer.
What is the solution to this system of equations?
x - 2y= 15
2x+4y= -18
A.
x= 1, y= -6
B.
C.
x= 1, y=-7
x= 3, y= -6
D.
x= 3, y=-7

x= 3 and y =-6

Step-by-step explanation:

I used elimination to solve it.

multiply the first equation by 2 so you can cancel out he y values

2 (x-2y=15)

2x- 4y = 30

2x +4y = -18   you can now eliminate -4y+4y because it makes

add the x's together 2x + 2x and do 30-18

4x=12 divide by 4

x =3

now that you know the value of x you use it to solve one of the original equations

3 -2y =15  subtract 3 from both sides

-2y = 15-3

-2y = 12 divide by -2

y = -6

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1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x