Matematyka z Plusem 1 ( gimnazjum ) Zadanie 2/186 Rozwiąż równania a) ---- b) ---- c---- d) -(2x-1) = 4 e) 2(x+1) = x f) 2t-(3t+1)=6 g) -(4+x) = 2(3-x) h) 3(y+6)-y = 2(y+9) i) (x-7)-2(3x+5) = 3

a) -3x = 2x-10 - 3x - 2x = - 10 - 5x = - 10 x = 2 b) 2x-2 = 7-x 2x + x = 7 + 2 3x = 9 x = 3 c) 10 = 4-2x 10 - 4 = - 2x 6 = - 2x x = - 3 d) -(2x-1) = x - 2x + 1 = x - 2x - x = - 1 - 3x = - 1 x = 1/3 e) 2(x+1)= x 2x +2 = x 2x - x = - 2 x = - 2 f)  2t-(3t+1) = 6 2t - 3t  - 3 = 6 - t = 6 + 3 - t = 9 t = - 9

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