[tex] \frac{10 \times (2x - 1)}{10 \times 12} - \frac{6 \times(1 - x)}{6 \times 20} - \frac{12 \times (7x - 12)}{12 \times 10} = \frac{30 \times (8 - x)}{30 \times 4} - \frac{24 \times (1 \times 5 + 2)}{24 \times 5}[/tex]
[tex]\frac{10 \times (2x - 1)}{120} - \frac{6 \times(1 - x)}{120} - \frac{12 \times (7x - 12)}{120} = \frac{30 \times (8 - x)}{120} - \frac{24 \times (1 \times 5 + 2)}{120}[/tex]
pentru ca toate fractiile au numaratorul 120, poti inmulti totul cu 120 ca sa iti dispara numitorul
20x - 10 - 6 + 6x - 84x + 144 = 240 - 30x - 168
-28x = 240-296
-28x = -56
x = 56:28 = 2
