2x-3y=1,6-2x+3y=-4

解答

2 x - 3 y = 1, 6 - 2 x + 3 y = - 4

无解

求解步骤

[2 x - 3 y = 1 6 - 2 x + 3 y = - 4]

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}

[6 - 2 \cdot \frac{1 + 3 y}{2} + 3 y = - 4]

化简

[5 = - 4]

5 = - 4

为假，因此方程组没有解

无解

3 x^{4} y = 2, (2) 2 x - 5 y = 9

x + y = 30, lo g_{3} (x) + lo g_{3} (y) = 4

f (x) = 2, x^{2} + 11 x - 219 x = \frac{3}{2}

x + y = 10, lo g_{2} (x) + lo g_{2} (y) = 4

f (x) = 2, x^{2} + 8 x - 3 x^{0} = - 3