Simplify the expression:

15-3[2+6(-3)]
I need a summer help on how to figure this out please.
Thank you

3 answers

Study this page about the order of operations.

http://www.mathsisfun.com/operation-order-pemdas.html

I'll be glad to check your answer.
-288?
15-3[2+6(-3)]

15 - 3(-16)

15 + 48 = 63