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受欢迎的代数 >

(3(6-x))/2 =(-2(x+1))/5

解答

\frac{3 ( 6 - x )}{2} = \frac{- 2 ( x + 1 )}{5}

解答

x = \frac{94}{11}

+1

十进制

x = 8.54545 \dots

求解步骤

\frac{3 ( 6 - x )}{2} = \frac{- 2 ( x + 1 )}{5}

使用分式交叉相乘: 若

\frac{a}{b} = \frac{c}{d}

则

a \cdot d = b \cdot c

3 (6 - x) \cdot 5 = 2 (- 2 (x + 1))

化简

15 (6 - x) = - 4 (x + 1)

展开

15 (6 - x) : 90 - 15 x

展开

- 4 (x + 1) : - 4 x - 4

90 - 15 x = - 4 x - 4

将

90

到右边

- 15 x = - 4 x - 94

将

4 x

para o lado esquerdo

- 11 x = - 94

两边除以

- 11

x = \frac{94}{11}

作图

流行的例子

7 x + 6 = - 22

\frac{6}{8} = \frac{x}{12}

- 9 = 3 - 3 (x + 3)

solvefor x,2x+y/2 =9

so l v e f or x, 2 x + \frac{y}{2} = 9

h - 3.7 = 1.2