(1)x3=12x-45y-51=0(3)
(2)x2=12x-4y-46=0(4)
由(3)得12x=45y+51(5)
将(5)带入(4)45y+51-4y-46=0
41y=-5
y=-5/41
将y带入(5)12x=45X(-5/41)+51
12x=-225/41+7134/41
12x=6909/41
x=6909/492
(1)x3=12x-45y-51=0(3)
(2)x2=12x-4y-46=0(4)
由(3)得12x=45y+51(5)
将(5)带入(4)45y+51-4y-46=0
41y=-5
y=-5/41
将y带入(5)12x=45X(-5/41)+51
12x=-225/41+7134/41
12x=6909/41
x=6909/492