0.2t+1.7t-0.54=0.22
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 т=0.4
0.2t+1.7t=0.22+0.54
1.9t=0.76
t=0.76:1.9
t=0.4