Question

Which operation should be used to solve x + 7 = 19?

Answer 1

Your answer is 12
X = 12
12+7=19

Answer 2

-7

Explanation:

If you use -7 the LHS will get cancelled.

x + 7 = 19

or, x + 7 - 7 = 19 - 7

or, x = 12