Question

What is x + y = 12 if x = 2y

Answer 1

i believe the answer is 4.

Answer 2

x=8

y =4

Explanation:

x + y = 12 if x = 2y

Replace x with 2y in the first equation

2y+y = 12

Combine like terms

3y =12

Divide by 3

3y/3 =12/3

y = 4

Now we can find x

x=2y

x=2(4)

x = 8