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受欢迎的代数 >

(-3)/((k-8))=(5k)/(16)

解答

\frac{- 3}{( k - 8 )} = \frac{5 k}{16}

解答

k = \frac{4 ( 5 + 10 )}{5}, k = \frac{4 ( 5 - 10 )}{5}

+1

十进制

k = 6.52982 \dots, k = 1.47017 \dots

求解步骤

\frac{- 3}{( k - 8 )} = \frac{5 k}{16}

使用分式交叉相乘

- 48 = (k - 8) \cdot 5 k

解

- 48 = (k - 8) \cdot 5 k : k = \frac{4 ( 5 + 10 )}{5}, k = \frac{4 ( 5 - 10 )}{5}

k = \frac{4 ( 5 + 10 )}{5}, k = \frac{4 ( 5 - 10 )}{5}

验证解

找到无定义的点（奇点）:

k = 8

将不在定义域的点与解相综合:

k = \frac{4 ( 5 + 10 )}{5}, k = \frac{4 ( 5 - 10 )}{5}

作图

流行的例子

solvefor x, 4/x =0.21

so l v e f or x, \frac{4}{x} = 0.21

- \frac{1}{x - 4} = 8

\frac{4}{x} = \frac{16}{4}

(100)/x =(30)/(28.25)

\frac{100}{x} = \frac{30}{28.25}

b \cdot (\frac{4}{b}) = 4, b, = 0