m:5+3=48/6
m:5=8-3
m:5=5
m=5*5
m=25
3) x-37_17/54=15_16/45
x-2015/54=1_16/45
x-2015/54=16/45
x=16/45+2015/54
x=10171/270
x=37_181/270