5(0.1x-0.5)-0.4(x-3)=-1.6

Question

5(0.1x-0.5)-0.4(x-3)=-1.6

Answer 1

Раскрываем скобки:

0,5х-2,5-0,4х+1,2=-1,6

0,1х=2,5-1,2-1,6

х=25-12-16

х=-3

Answer 2

0.5x-2.5-0.4x+1.2=-1.6
0.5x-0.4x=-1.6+2.5-1.2
0.1x=-0.3
x=-0.3*10
x=-3