0,4х-3,6-0,3х-0,6=0,7 0,1х=4,9 х=4,9/0,1 х=49
0.4x-3.6-0.3x-0.6=0.7 0.1x=0.7+3.6+0.6 0.1x=4.9 x=4.9:0.1 x=49