y=0,x=0,x=2

解答

y = 0, x = 0, x = 2

无解

求解步骤

y = 0 x = 0 x = 2

[x = 0 x = 2]

替代

x = 0

[0 = 2]

0 = 2

为假，因此方程组没有解

无解

3 n = 9, n = 3

2 x + y + 4 z = 12, 8 x - 3 y + 2 z = 23, 4 x + 11 y - z = 33

\frac{x}{2} + \frac{y}{3} = 2, \cdot \frac{x}{4} + \frac{y}{2} = 2

3 x + y = - 17, 5 x + 2 y = - 29

3 x - 2 y = 5, \frac{( 2 x )}{3} + \frac{y}{2} = - \frac{7}{9}