1) (15b+b):4=3
16b:4=3
4b=3
b=3/4
2) (0,87m-0,66m)*10:2:3=0
0,21m*10:2:3=0
0,35m=0
m=0
3) 10*(1,37k-0,12k):5:8=0
10* 1,25k:5:8=0
0,3125k=0
k=0
