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受欢迎的代数 >

2u+5v+1=0,u-2v+9=0

解答

2 u + 5 v + 1 = 0, u - 2 v + 9 = 0

解答

u = - \frac{47}{9}, v = \frac{17}{9}

求解步骤

[2 u + 5 v + 1 = 0 u - 2 v + 9 = 0]

对于

2 u + 5 v + 1 = 0

将

u

移到一边:

u = \frac{- 5 v - 1}{2}

替代

u = \frac{- 5 v - 1}{2}

[\frac{- 5 v - 1}{2} - 2 v + 9 = 0]

化简

[\frac{- 9 v - 1}{2} + 9 = 0]

对于

\frac{- 9 v - 1}{2} + 9 = 0

将

v

移到一边:

v = \frac{17}{9}

对于

u = \frac{- 5 v - 1}{2}

替代

v = \frac{17}{9}

u = \frac{- 5 \cdot \frac{17}{9} - 1}{2}

\frac{- 5 \cdot \frac{17}{9} - 1}{2} = - \frac{47}{9}

u = - \frac{47}{9}

方程组的解为:

u = - \frac{47}{9}, v = \frac{17}{9}

作图

流行的例子

35x-30y+12=0,30x+35y-10=0

35 x - 30 y + 12 = 0, 30 x + 35 y - 10 = 0

3x-4y+24=0,x+y-13=0

3 x - 4 y + 24 = 0, x + y - 13 = 0

2 x - y = 4, x + y = 5

3x+y=3,4x-3y=17

3 x + y = 3, 4 x - 3 y = 17

3x+2y+z=1,5x+3y+4z=2,x+y-z=1

3 x + 2 y + z = 1, 5 x + 3 y + 4 z = 2, x + y - z = 1