2x-7y=8y-2x=32
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2x-7y=8
y-2x=32
y-2x=32
2x-7y=8
7y=2x-8
y=(2x-8)/7 (1)
将(1)代入
(2x-8)/7-2x=32
2x-8=(2x+32)*7
2x-8=14x+224
12x=-232
x=-58/3 (2)
将(2)代入(1)得:
-116/3-7y=8
-116-21y=24
y=-20/3 解得:x=-58/3,y=-20/3
7y=2x-8
y=(2x-8)/7 (1)
将(1)代入
(2x-8)/7-2x=32
2x-8=(2x+32)*7
2x-8=14x+224
12x=-232
x=-58/3 (2)
将(2)代入(1)得:
-116/3-7y=8
-116-21y=24
y=-20/3 解得:x=-58/3,y=-20/3
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