Question

I don't want the answer, but I want to know how you got that answer.

4n + 5n + 15 = 5n + 7n

The answer should be like this: X = Constant

Answer 1

n = 5

Explanation:

`4n+5n+15=5n+7n\\\\9n+15=12n\\\\9n+15-15=12n-15\\\\-3n=-15\\\\(-3n=-15)/(-3)\\\\ \boxed{n=5}`

Hope this helps.