9х+10=0-9х+9=-8-3х+5=7хх+12=4х

9X + 10 = 0 9X = - 10 X = - 10/9 = - 1 1/9--------- 9X + 9 = - 8 - 9X = - 17 X = 17/9 = 1 8/9 --------- 3X + 5 = 7X 7X + 3X = 5 10X = 5 X = 0,5 ---------X + 12 = 4X 4X - X = 12 3X = 12 X = 4

[latex]1)9x+10=0 \ 9x=-10 \ x=-1 frac{1}{9} \ \ 2) -9x+9=-8 \ -9x=-8-9 \ -9x=-17 \ x=1 frac{8}{9} \ \ 3) -3x+5=7x \ -3x-7x=-5 \ -10x=-5 \ x=0.5[/latex][latex]4) x+12=4x \ x-4x=-12 \ -3x=-12 \ x=4[/latex]