Proszę ze sprawdzeniem Proszę

Witaj :) 2x - 3 = 8 - x 2x + x = 8 + 3 3x = 11 // :3 x = 3,(6) --------------------- 5x + 2 = 3x + 2 5x - 3x = 2 - 2 2x = 0 //:2 x = 0 -------------------- 6x - 7 = 9x + 5 6x - 9x = 5 + 7 -3x = 12 //: (-3) x = - 4

a) [latex]2x-3=8-x[/latex] [latex]2x+x=8+3[/latex] [latex]3x=11;|;:3[/latex] [latex]x=frac{11}{3}[/latex] [latex]x=3frac{2}{3}[/latex] Sprawdzenie: [latex]2cdot3frac{2}{3}-3=8-3frac{2}{3}[/latex] [latex]6frac{4}{3}-3=4frac{1}{3}[/latex] [latex]7frac{1}{3}-3=4frac{1}{3}[/latex] [latex]4frac{1}{3}=4frac{1}{3}[/latex] [latex]L=P[/latex] b) [latex]5x+2=3x+2[/latex] [latex]5x-3x=2-2[/latex] [latex]2x=0;|;:2[/latex] [latex]x=0[/latex] Sprawdzenie: [latex]5cdot0+2=3cdot0+2[/latex] [latex]2=2[/latex] [latex]L=P[/latex] c) [latex]6x-7=9x+5[/latex] [latex]6x-9x=5+7[/latex] [latex]-3x=12;|;:(-3)[/latex] [latex]x=-4[/latex] Sprawdzenie: [latex]6cdot(-4)-7=9cdot(-4)+5[/latex] [latex]-24-7=-36+5[/latex] [latex]-31=-31[/latex]