Уравнение 3 1/4x-4 5/7=3 5/12x-3 3/14
3 1/4х-4 5/7=3 5/12х-3 3/14 3х+1/4х-3х-5/12х=4+5/7-3-3/14 3/12х-5/12х=1+10/14-3/14 -2/12х=1+7/14 -1/6х=1 1/2=3/2 х=-3/2:1/6 х=-3/2*6=-9