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受欢迎的代数 >

| 5/x |=12

解答

\frac{5}{x} = 12

解答

x = - \frac{5}{12}, x = \frac{5}{12}

+1

十进制

x = - 0.41666 \dots, x = 0.41666 \dots

求解步骤

\frac{5}{x} = 12

化简

\frac{5}{x} : \frac{5}{∣ x ∣}

\frac{5}{∣ x ∣} = 12

在两边乘以

∣ x ∣

5 = 12 ∣ x ∣

解

5 = 12 ∣ x ∣ : x = - \frac{5}{12} or x = \frac{5}{12}

x = - \frac{5}{12}, x = \frac{5}{12}

验证解

找到无定义的点（奇点）:

x = 0

将不在定义域的点与解相综合:

x = - \frac{5}{12}, x = \frac{5}{12}

作图

流行的例子

\frac{15}{x} - 4 = \frac{2}{x}

5/(x-7)=(-11)/2

\frac{5}{x - 7} = \frac{- 11}{2}

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

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

solvefor q,v=(qh)/(q+h)

so l v e f or q, v = \frac{q h}{q + h}

(2x)/(3+5x-3(x+2))=6-x

\frac{2 x}{3 + 5 x - 3 ( x + 2 )} = 6 - x