Question

Реши уравнение:

1,4x−2,8=4,2x

Answer 1

-2,8=4,2х-1,4х
-2,8=2,8х
х=2,8:(-2,8)
х=-1

Answer 2

1.4х - 4.2х = 2.8
-2.8х = 2.8
х= -1