Question

решение уравнения |5х+1|=|3х-9|

Answer 1

5x+1=3x-9 
5x+3x=8x
-9+1=-8
8x=-8
x=-1

Answer 2

5х+1=3х-9 -5х-1=-3х+9
5х+3х=-9-1 -1-9=-3х+5х
8х=-10 -10=2х
х=-5/4 х=-5