zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的代数 >

(45x+15)/(5+x)=5x-5

解答

\frac{45 x + 15}{5 + x} = 5 x - 5

解答

x = \frac{5 + 57}{2}, x = \frac{5 - 57}{2}

+1

十进制

x = 6.27491 \dots, x = - 1.27491 \dots

求解步骤

\frac{45 x + 15}{5 + x} = 5 x - 5

在两边乘以

5 + x

45 x + 15 = 5 x (5 + x) - 5 (5 + x)

解

45 x + 15 = 5 x (5 + x) - 5 (5 + x) : x = \frac{5 + 57}{2}, x = \frac{5 - 57}{2}

x = \frac{5 + 57}{2}, x = \frac{5 - 57}{2}

验证解

找到无定义的点（奇点）:

x = - 5

将不在定义域的点与解相综合:

x = \frac{5 + 57}{2}, x = \frac{5 - 57}{2}

作图

流行的例子

solvefor F, d/F =j

so l v e f or F, \frac{d}{F} = j

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

5/(z-4)-2/(z+4)=0

\frac{5}{z - 4} - \frac{2}{z + 4} = 0

(x+1)/8 = 6/(x-1)

\frac{x + 1}{8} = \frac{6}{x - 1}

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

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