Question

1,2 × - 0,6 = 3,9-0,3 ×

Answer 1

1.2х-0.6=3.9-0.3х
1.2х+0.3х = 3.9+0.6
1.5 х = 4.5
х=4.5 : 15
х=3

Answer 2

1.2х-0.6=3.9-0.3х
1.2х+0.3х = 3.9+0.6
1.5 х = 4.5
х=4.5 : 15
х=3