Question

+4-{-5+[4×(7-2)-10]×(-2)}+3×(-7)

Answer 1

+4-{-5+[4×(7-2)-10]×(-2)}+3×(-7)

4 - { - 5 + [4× 5 - 10] × (-2)} - 21

4 - { - 5 + 10 × (-2) } - 21

4 - { -5 -20 } - 21

4 + 25 - 21

29 - 21

8<-----


Forte abraço!

Answer 2

+4-{-5+[4×(7-2)-10]×(-2)}+3×(-7)

+4-{-5+[4×5-10]×(-2)}+3×(-7)

+4-{-5+[20-10]×(-2)} - 21

+4-{-5+10×(-2)} - 21

+4-{-5-20} - 21

+4-{-25} - 21

+4 + 25 - 21

29 - 21

8