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5x+6y=39 6x -2y=10
人气:445 ℃ 时间:2020-04-09 06:48:23
解答
5x+6y=39,①
6x-2y=10,②
将②×3,得
18x-6y=30,③
①+③,得
23x=69.
解得x=3.
将x代入①(或②,任意一个都行),得
5×3+6y=39.
所以y=4.
所以x=3,
y=4.
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{5X-2Y=3,X+6Y=11怎么解 二元一次方程
(1) (5x+6y)的2次+(6x-5y)的2次-(5x-6y)(5x+6y) (2)(a+b+c)(a+b-c) 3:(x+y+z)
y=2x-3 3x+2y=3 5x-2y=3 x+6y=11 二分之x三分之y+=-3 7x=8y-4 3x+2y=1 2x-y+2z=-4 x+2y-z=3
解方程组:5x−2y=3x+6y=11.
2.5x-6y=2 5x+2y=46
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