а)4х(2х+2)-(8х-1)(х+6)=3 8х²+8-8х²+48х+х+6 18х²+49х+6
б)12(1-х)-4=2(4х+6) 12-12х-4=8х+12 -20х=4 х=-5 в)5(х-1)-3(2х+2)=-1 5х-5-6х+12=-1 х=8 г)43+4х+(11-5х)=7 43+4х+11-5х=7 х=47
д)12-4х-(2+х)=5х 12-4х-2-х=5х -10х=-10 х=1 е)0,9х+1=0,2-6 0.9х=-6.8 х=-7.5