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受欢迎的代数 >

(650)/x-(650)/(x+5)=6.5

解答

\frac{650}{x} - \frac{650}{x + 5} = 6.5

解答

x = 20, x = - 25

求解步骤

\frac{650}{x} - \frac{650}{x + 5} = 6.5

乘以最小公倍数

650 (x + 5) - 650 x = 6.5 x (x + 5)

解

650 (x + 5) - 650 x = 6.5 x (x + 5) : x = 20, x = - 25

x = 20, x = - 25

验证解

找到无定义的点（奇点）:

x = 0, x = - 5

将不在定义域的点与解相综合:

x = 20, x = - 25

作图

流行的例子

\frac{45}{x} = 235

\frac{4}{3 x - 5} = 4

(140+0.25x)/x =1

\frac{140 + 0.25 x}{x} = 1

x^{2} - \frac{3}{x} = 7

4 + \frac{6}{x} = 22