Найти корень уравнения: -5+9x=10x+4; 9+8x=6x-2; 8+7x=9x+4
-5+9х=10х+4 9х-10х=4+5 -х=9 х=-9 9+8х=6х-2 8х-6х=-2-9 2х=-11 х=-11:2 х=-5,5 8+7х=9х+4 8-4=9х-7х 4=2х х=4:2 х=2
9x-10x = 4+5 -1x = 9 x = 9:(-1) x = -9 8x-6x = -2-9 2x = -11 x = -11:2 x = -5,5 7x-9x = 4-8 -2x = -4 x = -4:(-2) x = 2