一个
X +2 Y = K(1)
2X +3 Y = 3K-1(2)
(2) - (1)
X + Y = 2K - 1
X + Y =
6 = 2K-1
K = 7/2.
3倍+5?= M +2(1)
2X +3 Y = M(2)
(1) - (2)
a>
X +2 Y = 2
X + Y = 2
Y = 0,x = 2时,
M = 2X +3?= 4.
一个
X +2 Y = K(1)
2X +3 Y = 3K-1(2)
(2) - (1)
X + Y = 2K - 1
X + Y =
6 = 2K-1
K = 7/2.
3倍+5?= M +2(1)
2X +3 Y = M(2)
(1) - (2)
a>
X +2 Y = 2
X + Y = 2
Y = 0,x = 2时,
M = 2X +3?= 4.