Question

800(4)-{3(5)•5(2)-7(27)}-y
when y is 90

Answer 1

3149

Explanation:

800(4)-{3(5)•5(2)-7(27)}-y

800(4)-{3(5)•5(2)-7(27)} - 90

3200 -{15•10-189} - 90

3200 -{150-189} - 90

3200 -{-39} - 90

3200 + 39 - 90

3149