Решить уравнения: 5х-8=3х-8; 5х-9/4=1/2х; 2х-3/5=3/4х-1/2

5x-8=3x-8
5x-3x=8-8
2x=0
x=2/0
x=0

5x-9/4=1/2x
5x-0.5x=2.25
4.5x=2.25
x=4.5/2.25
x=2

2x-3/5=3/4x-1/2
2x-3/4x=3/5-1/2
2x-0.75x=0.6-0.5
1.25x=0.1
x=0.1/1.25
x=0.08