Question

3/7 * y - 12 = -13 + y/7

Answer 1

Объяснение:

$\frac{3}{7} \times y - 12 = - 13 + \frac{y}{7} \\ 3y - 84 = - 91 + y \\ 3y - y = - 91 + 84 \\ 2y = - 91 + 84 \\ 2y = - 7 \\ y = - \frac{7}{2} = - 3 \frac{1}{2} = - 3.5$

Answer 2

3y-84= -91+y

3y-y= -91+84

2y= -7

Ответ: y= -7/2 или y= -7:2

y= -3,5