Solve y=x+8 for x

x=y+8

*=y+-8

x=-y+8

x=-y - 8

y=x+8

Move + 8 to the other side. Sign changes from + 8 to - 8.

y-8=x+8-8

y-8=x

x=y-8 or x=-8+y

Answer: x=y-8 or x=-8+y

Answer: B) x=y-8.

Explanation: to solve this problem we need to substract eight from both sides of the equation, in this way we isolate the x, the procedure is shown as follows:

y=x+8

y-8=x+8-8

y-8=x

so the answer is the corresponding to option B:

x=y-8