Question

If y=2x-8, what is the value of x when y=0?

A)-4

B)0

C)4

D)8

Answer 1

If y=0 then,
2x-8=0
2x=8
X=8/2
X=4
Answer is c

Answer 2

x=4

Explanation:

y = 2x - 8

Let y =0

0 = 2x-8

Add 8 to each side

8 = 2x-8+8

8 = 2x

Divide each side by 2

8/2 = 2x/2

4 =x