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数学
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方程组2分之x-3+3分之y-2=4 2分之x-3-3分之y-2=2(加减消元法)?
人气:122 ℃ 时间:2019-09-27 11:17:56
解答
(x-3)/2 + (y-2)/2 = 4 (1)
(x-3) - (y-2)/2 =2 (2)
(1)+(2),
(x-3)=6,x=9
(1)-(2)
(y-2)=2,y=4
所以最后结果是x=9,y=2
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