7х+3=30-2х 0,3(х-2)=0,1х+2 2/3 (1/3х-1/2)=6х-2(х-1 1/4)

1.) -7х +3 = 30 - 2х
    -7х+2х = 30 - 3
    -5х =28
     х = 5,6
2.) 0.3 (х-2) = 0.1х +2
    0.3х -0.6 = 0.1х + 2
    0.3х -0.1х = 2 + 0.6
   0.2х =2.6
     х = 1.3