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

解答

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

x = 1

求解步骤

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

乘以最小公倍数

5 (x + 2) + 3 (x - 1) = 15 x

展开

5 (x + 2) + 3 (x - 1) : 8 x + 7

8 x + 7 = 15 x

将

7

到右边

8 x = 15 x - 7

将

15 x

para o lado esquerdo

- 7 x = - 7

两边除以

- 7

x = 1

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

6 (\frac{1}{2} a + \frac{3}{4}) = 4.8

x - \frac{1}{4} x - \frac{1}{6} x = 471500

\frac{9 y + 12}{4} + \frac{3 y - 2}{2} = \frac{7}{2} y

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