3= y/(-4)

解答

3 = \frac{y}{- 4}

y = - 12

求解步骤

3 = \frac{y}{- 4}

交换两边

\frac{y}{- 4} = 3

在两边乘以

- 4

y = - 12

- 8 x - 9 = - 3 x + 16 - 3 x + 16

so l v e f or m, \frac{m}{n} + 5 m = 20

\frac{x + 12}{- 5} = - 4

4 (x - 1) = - 4 + 4 x

4 - 3 x = 2 x - 11