-1.5х+2+15х=6х+4+3 -1.5х+15х-6х=4+3-2 7.5х=5 х=5/7,5
-0.5*(3х-4)+15х=4*(1.5х+1)+3 -1,5x + 2 + 15x = 6x + 4 + 3 7,5x =5 5 x = 7,5 2 x = 3 2 Ответ: 3 .