Решите уровнение пж 91+48:(11-b)=99

Question

Решите уровнение пж 91+48:(11-b)=99

Answer 1

48:(11-b)=99-91
48:(11-b)=8
8(11-b)=48
88-8b=48
-8b=48-88
-8b=-40
8b=40
b=40/8
b=5

Answer 2

91+48/(11-в)=99
48/11-в=99-91
48/11-в=8
48=88-8в
8в=88-48
8в=40
в=5;в неравно 11