2x+3y=3 3x-2y=-2
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2x+3y=3 3x-2y=-2
2x+3y=3 3x-2y=-2
2x+3y=3 3x-2y=-2
解是x=0 y=1
2X+3y=3① ⒅ 3x-2y=-2 ② 可以分别乘以一个因数,
①式乘以3得6x+9y=9③,② 式乘以2得6x-4y=-4④;
③-④得:13y=13,因此y=1
所以2x+3y=3,y=1就得出x=0
6x +9y =9 ①
6x -4y =-4②
①-②得13y =13
可得y =1
同时可得x =0
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