0.4(x-3)=0.5(4+x)-2.5
0,4х-1.2=2+0.5х-2.5 0.4х-0.5х=2-2.5+1.2 -0.1х=0.7 х=0.7:(-0.1) х=-7
спс огр
0.4x-1.2=2+0.5x-2.5 -0.1x=0.7 x=-7