Даю 20 баллов! 1489, заранее спасибо!

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

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