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数学
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9x+2y=62.4x+3y=36.求x,y
人气:415 ℃ 时间:2020-03-21 17:15:05
解答
9x+2y=62 ……1
4x+3y=36 ……2
1*3-2*2
得:27x-8x=62*3-36*2
19x=114
x=6
y=(62-9x)/2=(62-9*6)/2=(62-54)/2=4
所以原不等式组的解为{x=6
{y=4
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