1)3-5х-10=6-3х

-5Х+3Х=6+10-3

-2Х=13

Х=-6,5

2)14-2Х=10Х+40-15+3Х

-2Х-10Х-3Х=40-29

-15Х=11

Х=-15/11

3-5(х+2)=6-3х

3-5х-10=6-3х

-5х+3х=6-3+10

-2х=13

х=-6,5

 2(7-х)=10(х+4)-3(5-х)

14-2х=10х+40-15+3Х

-2х-10х-3х=40-15-14

-15х=11

х=0,73