5x+2y/3=3/2-2x-3y/2 2(5x+2y)/3-49=3(2x-3y)解二元一次方程组半小时内,
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![5x+2y/3=3/2-2x-3y/2 2(5x+2y)/3-49=3(2x-3y)解二元一次方程组半小时内,](/uploads/image/z/174004-52-4.jpg?t=5x%2B2y%2F3%3D3%2F2-2x-3y%2F2+2%285x%2B2y%29%2F3-49%3D3%282x-3y%29%E8%A7%A3%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84%E5%8D%8A%E5%B0%8F%E6%97%B6%E5%86%85%2C)
5x+2y/3=3/2-2x-3y/2 2(5x+2y)/3-49=3(2x-3y)解二元一次方程组半小时内,
5x+2y/3=3/2-2x-3y/2 2(5x+2y)/3-49=3(2x-3y)解二元一次方程组
半小时内,
5x+2y/3=3/2-2x-3y/2 2(5x+2y)/3-49=3(2x-3y)解二元一次方程组半小时内,
5x+2y/3=3/2-2x-3y/2 (1)
2(5x+2y)/3-49=3(2x-3y) (2)
(1)x6化为:
42x-13y=9
(2)x3化为
31y-8x=147
解得
x=1.83
y=5.21
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
化简:5(x-y)+2(x+y)-3(x-y)
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
(2x-3y)-(5x-y)
(2X-3y)-(5x-y)
(2x-5y)(3x+y)
(x+y)(2x-3y)=?
x(x-y)2-(y-x)3
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)