3(1 - х) + 5(х + 2)= 1 - 4х.
3-3X+5X+10=1-4X 13+2X=1-4X 2X+4X=1-13 6X=-12 X=-12:6 X=-2
3-3x+5x+10=1-4x 3-3x+5x+10-1+4x=0 6x=-12 x=-12/6 x=-2