Solve the equation using addition or subtraction. Check your answer. -5 + x = 7

Answer 1

To solve the equation -5 + x = 7 using addition or subtraction, we need to isolate the variable x on one side of the equation.

First, let's add 5 to both sides to get rid of the -5 on the left side:

-5 + x + 5 = 7 + 5

This simplifies to:

x = 12

To check our answer, we substitute x=12 back into the original equation:

-5 + 12 = 7

-5 + 12 = 7 is indeed true, so our solution x=12 is correct.