Question

What number would you multiply the 2nd equation by in order to eliminate the y terms?

4x - 4y = 16
2x + y = 5

Answer 1

x=3

y=-1

Explanation:

first multiply the 2nd row by 2 so you will get

4x-4y=16

4x+2y=10

then subtract the 2nd row from the first row and so you will get

-6y=6

then solve for y in the above equation

y=-1

then substitute y=-1 into any 2 equations .

i picked the first 1

4x-4 × -1=16

then solve for x .

you will get

x=3