а)0.2t+1.7-0.54=0.22
1.9t-0.54=0.22
1.9t=0.22+0.54
1.9t=0.76
t=0.76/1.9
t=0.4
б)5.6z-2z-0.7z+2.65=7
2.9z+2.65=7
2.9z=7-2.65
2.9z=4.35
z= 4.35/2.9
z=1.5
а)0.2t+1.7-0.54=0.22
1.9t-0.54=0.22
1.9t=0.22+0.54
1.9t=0.76
t=0.76/1.9
t=0.4
б)5.6z-2z-0.7z+2.65=7
2.9z+2.65=7
2.9z=7-2.65
2.9z=4.35
z= 4.35/2.9
z=1.5