а)0,3-2х-2=0,4х+0,1,0,3-2х-2-0,4х-0,1=0,-2,4х-1,8-=0,-2,4х=1,8,х=0,75
б)6х-3,2=7х-6х+7,5,6х-3,2-7х+6х-7,5=0,5х-10,7=0,х=2,14