Verified answer

1) 3х-4=11    2)5-2х=0        3)-12-х=3     4)2х-1=3     5)2х-1=3х+6      6)х-8=-4х-9    

3х=11+4          -2х=0-5          -х=3+12       2х=3+1        2х-3х=6+1         х+4х=-9+8

3х=15              -2х=-5            -х=15          2х=4           -х=7                 5х=-1

х=5                  х=2,5             х=-15          х=2             х=-7                  х=-0,2

7)5-6х=0,3-5х

-6х+5х=0,3-5

-1х=-4,7

х=4,7