{5X-2Y=6 3X-2Y=20怎么解
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3x*5y+2x*6y=2.7*(3x+2x)怎么解
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解
二元一次方程(x+y)/2+(x-y)/3=6,4(x+y)-5(x-y)=2怎么算
{5X-2Y=6 3X-2Y=20怎么解
{2X=5(X+Y)3X-10(X+Y)=2怎么解?
2x=y 3y=x怎么解
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
这题怎么解?X-Y=4,2X+Y=20,X=?Y=?3X+2Y=14,2X-3Y=5,X=?Y=?写出具体算式
x^2+2y^2-2x+y-3=0与2x^2+5y^2-4x+y-6=0 的方程组怎么解
解方程组:1、6(x-y)-2(x-y)=14 2、3(x-y)+(x+y)+5 怎么解=5
3分之x+y+2分之x-y=5 2(x+y)-3(x-y)=6 怎么解
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
{x/60+y/80=10,x/60+y/40=15、{2x/3+3y/4=1/5,5x/6-5y/2=2、{5/2(x+y)=1200,10/3(x+y)=1200{4x+5y=98,5y-4x=2、{x/3+y/4=54/60,y/4+x/5=42/60怎么解?{40-y=x-4 40-y=y-x
X+y=15 2x-y=5y-x怎么解