Rozwiąż równania  a) 4x - 9 = x +12 b) 5x - 12=3x  + 4 c)6x - 18 = 2x+2 d) 10x +16= 3x +2 e) 13X+30 = 21x +14 f) 2x -2= -12x +18 Daję naj :)

a) 4x - 9 = x +12 3x = 21 x = 7 b) 5x - 12=3x  + 4 2x = 16 x = 8 c) 6x - 18 = 2x+2 4x = 20 x = 5 d) 10x +16= 3x +2 7x = -14 x = -2 e) 13X+30 = 21x +14 -8x = -16 x = 2 f) 2x -2= -12x +18 14x = 20 x = 20/14 = 1 i 6/14

4x-9=x+12 4x-x=12+9 3x=21/ :3 x=7 ------------- 5x-12=3x+4 5x-3x=4+12 2x=16/:2 x=8 ------------- 6x-18=2x+2 6x-2x=2+18 4x=20/:4 x=5 ----------------- 10x+16=3x+2 10x-3x=2-16 7x=-14/:7 x=-2 ------------ 13x+30=21x+14 13x-21x=14-30 -8x=-16/ :(-8) x=2 ---------------- 2x-2=-12x+18 2x+12x=18+2 14x=20/:14 x=20/14=1 6/14=1 3/7 ------------------------------