0,3(8-3у) = 3,2-0,8(у-7)
0,3(8-3y)=3.2-0.8(y-7) 2.4-0.9y=3.2-0.8y+5.6 -0.9y+0.8y=8.8-2.4 -0.1y=6.4 y=6.4 : (-0.1) y=-64