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受欢迎的代数 >

(2(x-4))/3 =(4(2x-1))/(15)

解答

\frac{2 ( x - 4 )}{3} = \frac{4 ( 2 x - 1 )}{15}

解答

x = 18

求解步骤

\frac{2 ( x - 4 )}{3} = \frac{4 ( 2 x - 1 )}{15}

使用分式交叉相乘: 若

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

则

a \cdot d = b \cdot c

2 (x - 4) \cdot 15 = 3 \cdot 4 (2 x - 1)

化简

30 (x - 4) = 12 (2 x - 1)

展开

30 (x - 4) : 30 x - 120

展开

12 (2 x - 1) : 24 x - 12

30 x - 120 = 24 x - 12

将

120

到右边

30 x = 24 x + 108

将

24 x

para o lado esquerdo

6 x = 108

两边除以

6

x = 18

作图

流行的例子

solvefor x,-2x+4y=6

so l v e f or x, - 2 x + 4 y = 6

solvefor x,4x+3y=-18

so l v e f or x, 4 x + 3 y = - 18

solvefor l,V=lwh

so l v e f or l, V = lw h

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

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

18 = 17 x + 1