Verified answer

Ответ:

-3 1/2

Пошаговое объяснение:

1/2у - 2/3у = 7/12

3/6у - 4/6у = 7/12

-1/6у = 7/12

у = 7/12 : (-1/6)

у = 7/12 * (-6/1)

у = 7/2 * (-1/1)

у = -7/2

у = -3 1/2

[tex] \frac{1}{2} y - \frac{2}{3} y = \frac{7}{12} \\ \frac{3}{6} y- \frac{4}{6} y = \frac{7}{12} \\ - \frac{1}{6} y = \frac{7}{12} \\ y = \frac{7}{12} \div ( - \frac{1}{6} ) \\ y = - \frac{7 \times 6}{12} \\ y = - \frac{7}{2} \\ y = - 3 \frac{1}{2} \\ y = - 3.5[/tex]