решите уравнения:
0.2t+1.7t- 0.54=0.22
5.6z-2z-0.7z+2,65=7

t(0.2+1.7)=0.22+0.541.9t=0.22+0.541.9t=0.76t=0.76:1.9t=0.4z(5.6-2-0.7)=7-2.652.9z=7-2.652.9z=4.35z=4.35:2.9z=1.5