Question

{-10+[15÷(-7+4)+(-12+7)]

Answer 1

{-10 +[15 ÷(-7+4) + (-12+7)] }=

{-10 + [ 15 ÷(-3) + (-5)]}=

{-10 +[-5 -5]}=

{-10+ [-10]}=

-10-10= -20

Answer 2

{-10+[15÷(-7+4)+(-12+7)]

{-10+[15÷(-3)+(-5)]

{-10+[- 5-5]

-10 - 10

- 20