1) 6X-10.2=02) 5X-4.5=3X+2.53) 2X-(6X-5)=45

Question

1) 6X-10.2=0

2) 5X-4.5=3X+2.5

3) 2X-(6X-5)=45

Answer 1

1) 6х-10.2=0
6х= 10.2
х= 10.2/6
х= 1.7
2)5х-4.5=3х+2.5
5х-4.5-3х-2.5=0
2х-7=0
2х=7
х=3.5
3) 2х-(6х-5)=45
2х-6х+5-45=0
-4х-40=0
-4х=40
4х=-40
х=-10