x-(x+5)/(x+8)= 3/(x+8)

解答

x - \frac{x + 5}{x + 8} = \frac{3}{x + 8}

x = 1

求解步骤

x - \frac{x + 5}{x + 8} = \frac{3}{x + 8}

在两边乘以

x + 8

x (x + 8) - (x + 5) = 3

解

x (x + 8) - (x + 5) = 3 : x = 1, x = - 8

x = 1, x = - 8

验证解

找到无定义的点（奇点）:

x = - 8

因为方程对以下值无定义:

- 8

x = 1

\frac{20}{x} - \frac{20}{x - 2} = \frac{4}{x}

x - \frac{2 x}{x + 1} = \frac{2}{x + 1}

2 x - \frac{32}{x} = 0

x - \frac{x + 3}{x - 5} = 2 x

1 + \frac{2}{x - 4} = \frac{7}{x ^{2} - 16}