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 >

(2(m+4)+13)/5 =(21-(8-3m))/4

解答

\frac{2 ( m + 4 ) + 13}{5} = \frac{21 - ( 8 - 3 m )}{4}

解答

m = \frac{19}{7}

+1

十进制

m = 2.71428 \dots

求解步骤

\frac{2 ( m + 4 ) + 13}{5} = \frac{21 - ( 8 - 3 m )}{4}

使用分式交叉相乘: 若

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

则

a \cdot d = b \cdot c

(2 (m + 4) + 13) \cdot 4 = 5 (21 - (8 - 3 m))

化简

4 (2 m + 21) = 5 (3 m + 13)

展开

4 (2 m + 21) : 8 m + 84

展开

5 (3 m + 13) : 15 m + 65

8 m + 84 = 15 m + 65

将

84

到右边

8 m = 15 m - 19

将

15 m

para o lado esquerdo

- 7 m = - 19

两边除以

- 7

m = \frac{19}{7}

作图

流行的例子

solvefor x,11x+7y=123

so l v e f or x, 11 x + 7 y = 123

solvefor y,2x+y=0

so l v e f or y, 2 x + y = 0

(3-x/4)+(x-x/3)+7=(1-(3x)/2)-7/12

(3 - \frac{x}{4}) + (x - \frac{x}{3}) + 7 = (1 - \frac{3 x}{2}) - \frac{7}{12}

-2(-1+v)-3v=-v+18

- 2 (- 1 + v) - 3 v = - v + 18

x + 18 + 5 x - 6 = 180