2x-3y-8=0,5y-7x-5=0
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2x-3y-8=0,5y-7x-5=0
2x-3y-8=0,5y-7x-5=0
2x-3y-8=0,5y-7x-5=0
由2x-3y-8=0
得y=(2x-8)/3
将其代入5y-7x-5=0
得5(2x-8)/3-7x=5
左右两边同时乘以3
得10x-40-21x=15
x=-5
将x=-5代入2x-3y-8=0
-10-3y-8=0
y=-6
所以x=-5,y=-6
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