2х+7=х+5,5
2х-х=5,5-7
Х=-1,5
9,5х+2=5,7х-5,6х
9,5х+2=0,1х
9,5х-0,1х=-2
9,4х=-2
Х=-20/94
Х= -10/47
29х+7,4=х+1,7
28х=1,7-7,4
28х=-5,7
Х=-57/280
2х-0.5=0,75х
-1.25х=0,5
Х=-50/125
Х=-10/25
Х=-2/5
Х=-0.4
2х+7=х+5,5
2х-х=5,5-7
Х=-1,5
9,5х+2=5,7х-5,6х
9,5х+2=0,1х
9,5х-0,1х=-2
9,4х=-2
Х=-20/94
Х= -10/47
29х+7,4=х+1,7
28х=1,7-7,4
28х=-5,7
Х=-57/280
2х-0.5=0,75х
-1.25х=0,5
Х=-50/125
Х=-10/25
Х=-2/5
Х=-0.4