A)7,02: (y+1,2)=1? 2 b)(z+3,5)*5,1=36,72 c)2,7l+3,6l-1,2l=36,4

A) y+1.2=7.02:1.2
  y+1.2=5.85
  y=5.85-1.2
  y=4.65
b) 5.1z+17.85=36.72
   5.1z=36.72-17.85
  5.1z=18.87
  z=18.87:5.1
  z=3.7
c) 5.1L=36.4
   L=36.4:5.1
   L=7.14