6(x-8)=90. 5(x+1)=9. 3(x-4)=1

6х - 48 = 90 6х = 90 + 48 6х = 138 х = 23 ---------------------------- 5х + 5 = 9 5х = 9 - 5 5х = 4 х = 0,8 ---------------------------- 3х - 12 = 1 3х = 1 + 12 3х = 13 х = 4целых 1/3 --------------------------