Question

решите уравнение
9-x=0,4(3x-5)

Answer 1

9-x = 0,4(3х-5)
9-х = 1,2х - 2
1,2х + х = -2 -9
2,2х = -11
х = -5

Answer 2

-x=1,2-2-9
-2,2х=-11
х=-(-11/2,2)
х=5