Question

21=8+x (solve for x)

Answer 1

x=13

Explanation:

21=8+x

Swap sides so that all variable terms are on the left hand side.

8+x=21

Subtract 8 from both sides.

x=21−8

Subtract 8 from 21 to get 13.

x=13

Answer 2

X=13

Explanation: