Помогите пожалуйста 4 номер!!!!!!!!!!!!!!!!!!!
-4(2,3x-3)-(5-2,6x)+3(0,6x-2) = -9,2x+12-5+2,6x+1,8x-6 = -4,8x+1. При х=5/12 -> -48/10*5/12 + 1 = -4/2+1 = -2+1 = -1.
-9,2х+12-5+2.6х+1.8х-6=-4.8х+1 -4.8*5/12+1=-24/5*5/12+1=-2+1=-1