Zad 10 str. 199 Matematyka z plusem klasa 1 gimnazjum 10. Rozwiąż równania. a) 1/2x - 4 = x-6 b) x-5=1/3x + 1 c) x/4 - 1/4 = 2 d) x/5 - 3 = x + 1/5 e) 5/6 (x-1) = 4 f) -1/2 (-x-6) = -x Daje naj naj naj naj pilne

Rozwiąż równania. a) 1/2x - 4 = x-6 1/2x-x = -6+4 -1/2x = -2  /:(-1/2) x = 4   b) x-5=1/3x + 1 x-1/3x = 1+5 2/3x = 6  /:2/3 x = 6·3/2 x = 18/2 x = 9   c) x/4 - 1/4 = 2  /·4 x-1 = 8 x = 8+1 x = 9   d) x/5 - 3 = x + 1/5  /·5 x-15 = 5x+1 x-5x = 1+15 -4x = 16  /:(-4) x = -4   e) 5/6 (x-1) = 4 5/6x-5/6 = 4 5/6x = 4+5/6  /:5/6 x = 29/6·6/5 x = 29/5 x = 5 4/5   f) -1/2 (-x-6) = -x 1/2x+3 = -x 1/2x+x = -3 1 1/2x = -3  /:3/2 x = -3·2/3 x = -6/3 x = -2