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受欢迎的代数 >

(10)/x =(10x)/9

解答

\frac{10}{x} = \frac{10 x}{9}

解答

x = 3, x = - 3

求解步骤

\frac{10}{x} = \frac{10 x}{9}

使用分式交叉相乘

90 = 10 x^{2}

解

90 = 10 x^{2} : x = 3, x = - 3

x = 3, x = - 3

验证解

找到无定义的点（奇点）:

x = 0

将不在定义域的点与解相综合:

x = 3, x = - 3

作图

流行的例子

solvefor x,(ax+b)/(cx+d)=5

so l v e f or x, \frac{a x + b}{c x + d} = 5

a(2-(-1/a))^2=1

a (2 - (- \frac{1}{a}))^{2} = 1

solvefor a,u= k/(2a)

so l v e f or a, u = \frac{k}{2 a}

\frac{8}{x} + \frac{3}{x - 1} = 3

(20)=((70x)/(70+x))

(20) = (\frac{70 x}{70 + x})