1.9-х=2.136:7.12
1.9-х=0.3
-х=0.3-1.9
-х=-1.6
х=1.6
б)4.2*(0.8+у)=8.82
3.36+4.2у=8.82
4.2у=8.82-3.36
4.2у=5.46
у=5.46:4.2
у=1.3
в)0.2t+1.7t-0.54=0.22
1.9t=0.22+0.54
1.9t=0.76
t=0.76:1.9
t=0.4
г)5.6z-2z-0.7z+2.65=7
2.9z=7-2.65
2.9z=4.35
z=4.35:2.9
z=1.5
Пошаговое объяснение:
1.9-х=2.136:7.12
1.9-х=0.3
-х=0.3-1.9
-х=-1.6
х=1.6
б)4.2*(0.8+у)=8.82
3.36+4.2у=8.82
4.2у=8.82-3.36
4.2у=5.46
у=5.46:4.2
у=1.3
в)0.2t+1.7t-0.54=0.22
1.9t=0.22+0.54
1.9t=0.76
t=0.76:1.9
t=0.4
г)5.6z-2z-0.7z+2.65=7
2.9z=7-2.65
2.9z=4.35
z=4.35:2.9
z=1.5
Пошаговое объяснение: