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受欢迎的代数 >

-2x+3y=1,8-5y+x=-23

解答

- 2 x + 3 y = 1, 8 - 5 y + x = - 23

解答

x = \frac{88}{7}, y = \frac{61}{7}

求解步骤

[- 2 x + 3 y = 1 8 - 5 y + x = - 23]

对于

- 2 x + 3 y = 1

将

x

移到一边:

x = - \frac{1 - 3 y}{2}

替代

x = - \frac{1 - 3 y}{2}

[8 - 5 y - \frac{1 - 3 y}{2} = - 23]

化简

[\frac{- 1 - 7 y}{2} + 8 = - 23]

对于

\frac{- 1 - 7 y}{2} + 8 = - 23

将

y

移到一边:

y = \frac{61}{7}

对于

x = - \frac{1 - 3 y}{2}

替代

y = \frac{61}{7}

x = - \frac{1 - 3 \cdot \frac{61}{7}}{2}

- \frac{1 - 3 \cdot \frac{61}{7}}{2} = \frac{88}{7}

x = \frac{88}{7}

方程组的解为:

x = \frac{88}{7}, y = \frac{61}{7}

作图

流行的例子

2x+x-y/6 =2,x-2x+y/3 =1

2 x + x - \frac{y}{6} = 2, x - 2 x + \frac{y}{3} = 1

y=((23x))/4 ,x=-8

y = \frac{( 23 x )}{4}, x = - 8

141x+93y=18,993x+141y=45

141 x + 93 y = 18, 993 x + 141 y = 45

-x+4y=11,2x+y=-4

- x + 4 y = 11, 2 x + y = - 4

x/2+y/3 =2, x/3+y/9 =1

\frac{x}{2} + \frac{y}{3} = 2, \frac{x}{3} + \frac{y}{9} = 1