x-5x+6=0


x-8x+7=0



x-9x+8=0

x-5x+6=0-4х=-6х=-6:(-4)=1.5x-8x+7=0-7х=-7х=-7:(-7)х=1x-9x+8=0-8х=-8х=-8:(-8)х=1

1) x - 5x + 6 = 0 2) x - 8x + 7 = 0. 3) x - 9x + 8 = 0- 4x = -6 | : (-4). - 7x = -7. | : (- 7). - 8x = - 8 | : (-8) x = 1.5 x = 1 x = 1