0.4х-1.2=2+0.5х-2.5
0.4х-0.5х=1.2+2+2.5
-0.1х=4.7
Х=4.7:(-0.1)
Х=47
0.4x-1.2=2+0.5x-2.5
0.4x-1.2=-0.5+0.5x
0.4x-0.5x=-0.5+1.2
-0.1x=0.7
x=0.7÷0.1
x=-7
0.4х-1.2=2+0.5х-2.5
0.4х-0.5х=1.2+2+2.5
-0.1х=4.7
Х=4.7:(-0.1)
Х=47
0.4x-1.2=2+0.5x-2.5
0.4x-1.2=-0.5+0.5x
0.4x-0.5x=-0.5+1.2
-0.1x=0.7
x=0.7÷0.1
x=-7