7x-(5x-4)=11
4(x-5)-(7x+4)=6
(3x-1)-3(2-x)=11

2,3x+4,6=0
4,5x-13,5=0
22x-1,1=0
5,5x+22=0

7х-5х+4=112х=11-42х=8х=7/2=44х-20-7х-4=6-3х-24=63х=-24-6=-30х=-30/3=-103х-1-6+3х=116х=11+7=18х=18/6=32.3х=-4.6х=-4.6/2.3=-2 4.5х=13.5 х=13.5/4.5=3 22х=1.1 х=1.1÷22 х=0.05 5.5х=-22 х=-22/5.5=-4