Question

What property is used to solve 9x + 5 = 21 and 9x + 5 -5 = 21 - 5

Answer 1

Problem

What property is used to solve 9x + 5 = 21 and 9x + 5 -5 = 21 - 5

Solution

9x +5 =21

If we subtract 5 in both sides we got:

9x +5-5 =21-5

Subtraction property of equality