3x-2y=4 4x-5y=3 麻烦了!
1个回答
解
3x-2y=4 (1)
4x-5y=3 (2)
(1)×4得:
12x-8y=16 (3)
(2)×3得:
12x-15y=9 (4)
(3)-(4)得:
7y=7
∴y=1
∴x=2
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