solving with numbers in brackets

Question

In Algebra I am given the following problem:

 

6 (1 - 3) - [8 (7 + 3)]

 

Please help me.

Answer 1

6(1 - 3) - [ 8(7 + 3)]

6(-2) - [ 8( 10)]            parenthesis first

-12 - [80]                     multiplication

-12 - 80                       brackets not needed

-98