Question

75-960:(2в-в+39)=30+5*5

Answer 1

$75 - 960 div (2b - b + 39) = 30 + 5 times 5 \ - 960 div (b + 39) = 55 - 75 \ b + 39 = frac{ - 960}{20} \ b + 39 = - 48\ b = - 87$