Question

To solve this system of equations by elimination, what operation could be used to eliminate the x-variable and find the value of y? 2x − 4y = 6 −3x + 3y = 9

Answer 1

1. x equals to -9
2. y equals to -6

Answer 2

Step-by-step explanation:

• 2x-4y=6

take 2 common 2(x-2y)=6

x-2y=3. i

similarly -3(x-y)=9.

x-y= -3. ii

eliminating both above equation

x-2y= 3

x-y=-3

subtracting eq ii from i

-y= 6

y= -6