Question

0,4х + 3 = 0,2(3х + 1) - х

Answer 1

0.4x+3=0.2(3x+1)-x
0.4x+3=0.6x+0.2-x
3-0.2=0,6x-0.4x-x
2.8=-0.8x
x=-3,5

Answer 2

0.4х+3=0.6х+0.2-х
0.4х+3-0.6х+х=0.2
0.4х-0.6х+х=0.2-3
-0.2х+х=-2.8
0.8х=-2.8
х=-2.8/0.8
х=-3.5
Ответ: -3.5