3(х-4)-5(х+2)=-18-4x
3(x-4) -5(x+2) = - 18 - 4x 3x - 12 - 5x - 10 = - 18 - 4x -2x - 22 = -18 - 4x -2x + 4x = -18 +22 2x = 4 x= 4:2 х=2 ======================= 3(2-4) - 5(2+2) = - 18 - 4* 2 3 * (-2) - 5*4 = - 18 - 8 - 6 - 20 = -26 -26 = -26