SOLUTION: Having problem helping daughter with homework, {{{65x-(-12x)}}} thank you very much

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Question 9358: Having problem helping daughter with homework, 65x-%28-12x%29
thank you very much
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
when you have 2 symbols together like here, 65x-%28-12x%29, there are rules that help to simplify. I have written a Lesson on this website that explains these very simple rules (but to be honest, rather difficult to explain why, in a meaningful way).

Anyway - and - can be thought of as + so we get 65x+%2B+12x which in turn is 77x

jon.