Question

помогите:4,2*(0,8+y)=8,82.





0,2t+17t-0,54=0,22






5,6z-2z-0,7z+2,65=7

Answer 1

1) 0.8+y=2.1
y=2.1-0.8
y=1.3
2) 1.9t=0.22+0.54
1.9t=0.76
t=0.4
3) 2.9z=7-2.65
2.9z=4.35
z=1.9