4x-15y-17=0 (1) 6x-2y-23=0 (2)有心人来
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4x-15y-17=0 (1) 6x-2y-23=0 (2)有心人来
嗯 解方程 用加减法解
嗯 解方程 用加减法解
![4x-15y-17=0 (1) 6x-2y-23=0 (2)有心人来](/uploads/image/z/20301367-31-7.jpg?t=4x-15y-17%3D0+%281%29+6x-2y-23%3D0+%282%29%E6%9C%89%E5%BF%83%E4%BA%BA%E6%9D%A5)
(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
(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
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