Question

(a+18b+21):(a+2b+7) если a/b=6

Answer 1

(6+18*6+21):(6+2*6+7)=54
1)18*6=108
2)2*6=12
3)6+108=114
4)114+21=135
5)6+12=18
6)18+7=25
7)135:25=54