b/4 = a/(x+6)

解答

\frac{b}{4} = \frac{a}{x + 6}

x = \frac{4 a}{b} - 6; b \neq = 0

求解步骤

\frac{b}{4} = \frac{a}{x + 6}

使用分式交叉相乘

b (x + 6) = 4 a

两边除以

b; b \neq = 0

x + 6 = \frac{4 a}{b}; b \neq = 0

将

6

到右边

x = \frac{4 a}{b} - 6; b \neq = 0

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

\frac{x - 4}{x - 2} = \frac{- 3}{4}

\frac{( 1 ) x + 1}{x} = \frac{21}{20}

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

\frac{12}{30} = \frac{( 2 x )}{( 4 x + 10 )}