Question

My math problem went from 10a+15=65 to 10a+15-15=65-15. Explain what happened in this step.

Answer 1

You are subtracting 15 from both side to isolate 10 a it would look like this afterwards:

10a=65-15

And you continue to solve

Explanation:

Answer 2

You subtracted 15 from both sides so you can isolate 10a.