Question

simplify6[-85-(-57-21)]

Answer 1

=6[-85-(-57-21)]
=6[-85-(-78)]
=6[-7]
=-42

Answer 2

6[-85-(-57-21)]

Subtract 21 from -57 to get -78.
6(-85-(-78))

Multiply -1 by the -78 inside the parentheses.
6(-85+78)

Add 78 to -85 to get -7.
6(-7)

Multiply 6 by each term inside the parentheses.
-42