30+10(x-6)=30:10(x-6)=0,10x-60=0,x=6
6x-7=5x+4:6x-5x=4+7,x=11
4(4x-11)=3(22-2x):16x-44=66-6x,22x=110,x=5
7(2x-6)=84:12x-42=84,14x=126,x=9
5(x-8)=3x:5x-40=3x,2x=40,x=20
4.2x-9=2.5x+2.9:4.2x-2.5x=2.9+9,1.7x=11.9,x=7请把9(2x-3)-2=5(2x-1)的答案写出 我一定加分，采纳！！！9(2x-3)-2=5(2x-1):18x-27-2=10x-5, 18x-10x=29-5, 8x=24, x=3