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受欢迎的代数 >

2/5 (10j-25+15j)-3/2 (6j-4)=-2j

解答

\frac{2}{5} (10 j - 25 + 15 j) - \frac{3}{2} (6 j - 4) = - 2 j

解答

j = \frac{4}{3}

+1

十进制

j = 1.33333 \dots

求解步骤

\frac{2}{5} (10 j - 25 + 15 j) - \frac{3}{2} (6 j - 4) = - 2 j

\frac{2}{5} (10 j - 25 + 15 j) = \frac{2 ( 25 j - 25 )}{5}

\frac{3}{2} (6 j - 4) = \frac{3 ( 6 j - 4 )}{2}

\frac{2 ( 25 j - 25 )}{5} - \frac{3 ( 6 j - 4 )}{2} = - 2 j

乘以最小公倍数

100 (j - 1) - 30 (3 j - 2) = - 20 j

展开

100 (j - 1) - 30 (3 j - 2) : 10 j - 40

10 j - 40 = - 20 j

将

40

到右边

10 j = - 20 j + 40

将

20 j

para o lado esquerdo

30 j = 40

两边除以

30

j = \frac{4}{3}

作图

流行的例子

5 x + 4 = 3 - 4 (x + 2)

solvefor x,4x+y=20

so l v e f or x, 4 x + y = 20

solvefor x,2x=2y

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

(3-k)/8 =(2k+1)/5

\frac{3 - k}{8} = \frac{2 k + 1}{5}

7(x-1)-2(x+1)=4x

7 (x - 1) - 2 (x + 1) = 4 x