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受欢迎的代数 >

30=(6(x-1))/(5+2x)

解答

30 = \frac{6 ( x - 1 )}{5 + 2 x}

解答

x = - \frac{26}{9}

+1

十进制

x = - 2.88888 \dots

求解步骤

30 = \frac{6 ( x - 1 )}{5 + 2 x}

在两边乘以

5 + 2 x

30 (5 + 2 x) = 6 (x - 1)

展开

30 (5 + 2 x) : 150 + 60 x

展开

6 (x - 1) : 6 x - 6

150 + 60 x = 6 x - 6

将

150

到右边

60 x = 6 x - 156

将

6 x

para o lado esquerdo

54 x = - 156

两边除以

54

x = - \frac{26}{9}

验证解

找到无定义的点（奇点）:

x = - \frac{5}{2}

将不在定义域的点与解相综合:

x = - \frac{26}{9}

作图

流行的例子

100/360 =(5pi)/x

\frac{100}{360} = \frac{5 π}{x}

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

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

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

\frac{x}{x + 4} = \frac{6}{5}

(2x)/(x+1)= 5/(x-3)+1

\frac{2 x}{x + 1} = \frac{5}{x - 3} + 1