Question

Даю 20 баллов! 1489, заранее спасибо!

Answer 1

А) 2,136:(1,9-х)=7,12
1,9-х=2,136:7,12
1,9-х=0,3
х=1,9-0,3
х=1,6

б)4,2*(0,8+у)=8,82
0,8+у=8,82:4,2
0,8+у=2,1
у=2,1-0,8
у=1,3

в)0,2t+1.7t-0.54=0.22
0.2t+1.7t=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
5,6z-2z-0.7z=7-2.65
2.9z=4.35
z=4.35:2.9
z=1.5

Answer 2

А) 2,136:(1,9-х)=7,12
1,9-х=2.136:7.12
1,9-х=0.3
х=1.9-0.3
х=1.6

б)4.2*(0.8+у)=8.82
0.8+у=8.82:4.2
0.8+у=2.1
у=2.1-0.8
у=1.3

в)0.2t+1.7t-0.54=0.22
1.9t=0.22+0.54
1.9t=0.76
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