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受欢迎的代数 >

(75k)/(75k+50)*100=24

解答

\frac{75 k}{75 k + 50} \cdot 100 = 24

解答

k = \frac{4}{19}

+1

十进制

k = 0.21052 \dots

求解步骤

\frac{75 k}{75 k + 50} \cdot 100 = 24

化简

\frac{75 k}{75 k + 50} \cdot 100 : \frac{300 k}{3 k + 2}

\frac{300 k}{3 k + 2} = 24

在两边乘以

3 k + 2

300 k = 24 (3 k + 2)

展开

24 (3 k + 2) : 72 k + 48

300 k = 72 k + 48

将

72 k

para o lado esquerdo

228 k = 48

两边除以

228

k = \frac{4}{19}

验证解

找到无定义的点（奇点）:

k = - \frac{2}{3}

将不在定义域的点与解相综合:

k = \frac{4}{19}

作图

流行的例子

(24)/x-(15)/(x+5)=2

\frac{24}{x} - \frac{15}{x + 5} = 2

1/(x+1)+(2x+3)/(x^2-1)=0

\frac{1}{x + 1} + \frac{2 x + 3}{x ^{2} - 1} = 0

(12)/x+3/4 = 3/2

\frac{12}{x} + \frac{3}{4} = \frac{3}{2}

\frac{3}{x} + \frac{1}{4} = \frac{8}{x}

(x^2)/(x^2+3)=0

\frac{x ^{2}}{x ^{2} + 3} = 0