Question

The answer key says the solution is -66 and I cannot figure out how that’s possible.

Answer 1

Answer: -66

Explanation:

use PEMDAS. Evaluate the parentheses, then multiplication, then addition.

-3[-3(-4 - 1) - (-3 - 4)]

↓ ↓

-3[-3( -5 ) - ( -7 )]

↓ ↓

-3[ 15 + 7 ]

↓

-3[ 22 ]

↓

-66