18) 5x + 9 = 2 x + 36 / - 2 x 3 x + 9 = 36 / - 9 3 x = 27 x = 9 Spr. L = 5 * 9 + 9 = 54 P = 2 * 9 + 36 = 54 L = P 19) 12x+4=7x+14 / - 7x 5x + 4 = 14 / - 4 5x = 10 / :5 x = 2 Spr. L = 12 * 2 + 4 = 28 P = 7 * 2 + 14 = 28 L = P 20) 7x - 17 = 6x - 16 / -6x x - 17 = -16 / +17 x = 1 Spr. L = 7 * 1 - 17 = - 10 P = 6 * 1 - 16 = - 10 L = P 21) 2x+2=x + 18 / -x x + 2 = 18 / -2 x = 16 Spr. L = 2 * 16 + 2 = 34 P = 16 + 18 = 34 L = P 22) 3x+5=2x + 13 / - 2x x + 5 = 13 / - 5 x = 8 Spr. L = 3 * 8 + 5 = 29 P = 2 * 8 + 13 = 29 L = P 23) 9x = 6x +12 /-6x 3x = 12 / :3 x = 4 Spr. L = 9 * 4 = 36 P = 6 * 4 + 12 = 36 L = P 24) 3x+5=2x +15 /-2x x + 5 = 15 / -5 x = 10 Spr. L = 3 * 10 + 5 = 35 P = 2 * 10 + 15 = 35 L = P
18)5x+9 = 2x + 36 5x-2x = 36-9 3x = 27 |;3 x = 9 L = 5*9+9 = 45+9 = 54 P = 2*9+36 = 18+36 = 54 L = P 19) 12x+4=7x+14 12x-7x = 14-4 5x = 10 |:5 x = 2 L = 12*2+4 = 24+4 = 28 P = 7*2+14 = 14+14 = 28 L = P 20)7x - 17 = 6x - 16 7x-6x = -16+17 x = 1 L = 7*1-17 = 7-17=-10 P = 6*1-16 = 6-16=-10 L = P 21)2x+2=x + 18 2x-x = 18-2 x = 16 L = 2*16+2 = 32+2 = 34 P = 16+18= 34 L = P 22)3x+5=2x + 13 3x-2x = 13-5 x = 8 L = 3*8+5 = 24+5 = 29 P = 2*8+13 = 16+13 = 29 L = P 23)9x = 6x +12 9x-6x = 12 3x = 12 |;3 x = 4 L = 9*4 = 36 P = 6*4+12 = 24+12 = 36 L = P 24)3x+5=2x +15 3x-2x = 15-5 x = 10 L = 3*10+5= 30+5 = 35 P = 2*10+15 = 20+15 = 35 L = P Grupujemy iksy na jedną stronę liczby bez iksów na drugą. Przenosząc liczbę na drugą stronę znaku równości zmieniamy znak przed nią czyli plus na minus i minus na plus.
