Question

simplify (-12)+42-7-2​

Answer 1

Answer:

$- 12 + 42 - 7 - 2 \\ = 30 - 9 \\ = 21$

I hope you anderstand.....

Answer 2

Answer:

-12 + 42 -7 -2

-12 + 42 -9

-12 + 33

+21

so., 21 is the answer