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 >

1/3x-1/3y=-1/3 ,-1/7x+1/8y= 2/7

解答

\frac{1}{3} \cdot x - \frac{1}{3} \cdot y = - \frac{1}{3}, - \frac{1}{7} \cdot x + \frac{1}{8} \cdot y = \frac{2}{7}

解答

x = - 9, y = - 8

求解步骤

[\frac{1}{3} x - \frac{1}{3} y = - \frac{1}{3} - \frac{1}{7} x + \frac{1}{8} y = \frac{2}{7}]

对于

\frac{1}{3} \cdot x - \frac{1}{3} \cdot y = - \frac{1}{3}

将

x

移到一边:

x = - 1 + y

替代

x = - 1 + y

[- \frac{1}{7} (- 1 + y) + \frac{1}{8} y = \frac{2}{7}]

化简

[\frac{8 - y}{56} = \frac{2}{7}]

对于

\frac{8 - y}{56} = \frac{2}{7}

将

y

移到一边:

y = - 8

对于

x = - 1 + y

替代

y = - 8

x = - 1 - 8

化简

x = - 9

方程组的解为:

x = - 9, y = - 8

作图

流行的例子

x+y-2z=8,2x-y+z=3,3x+y+2z=6

x + y - 2 z = 8, 2 x - y + z = 3, 3 x + y + 2 z = 6

-m+n=-1,4m-2n=5

- m + n = - 1, 4 m - 2 n = 5

4(x-y)=-2,3x-7y=-25-2(x+y)

4 (x - y) = - 2, 3 x - 7 y = - 25 - 2 (x + y)

x - y = 3, 2 x + 4 y = 12

x + y = 2, 4 - 3 x + y = 0