2X+3Y=54 3X+2Y=56 X=?Y=?

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2X+3Y=54 3X+2Y=56 X=?Y=?
2X+3Y=54 3X+2Y=56 X=?Y=?

2X+3Y=54 3X+2Y=56 X=?Y=?
2X+3Y+3X+2Y=5X+5Y=110,即X+Y=22
3X+2Y-2X-3Y=X-Y=2
X+Y+X-Y=22+2
2X=24
X=12
Y=12-2=10

Y=10
x=12

x=12,y=10

x=12
y=10

x=12 y=10

X=12
Y=10

X=12，y =10

Y=10.X=12

X=12，y =10

x=12,y=10
采纳吧

3*(2X+3Y)=162
2*(3X+2Y)=112
相减，得Y=10 代入原式得X=12

2X+3y=54为一式，给一式乘以3.得到6X+9Y=162
3X+2Y=56为二是，给二式乘以2，得到6X+4Y=112
一式减二式得到5Y=162-112解得Y=10,回代X=12

X+Y=22，X=12，Y=10

(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分之一已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) (x+y)(2x-3y)=? x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 3^x+2x=y,x 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 2X+3Y=54 3X+2Y=56 X=?Y=? 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值已知3x =2y 求x/x+y+y/x-y-y²/x²-y² {(x+2)^2-(y-3)^2=(x+y)(x-y) {x-3y=2 (3x-y)^2+(3x+y)(3x-y),x=1,y=-2 2（x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15 x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2 x+y=-3 xy+x+y=-2 x/y+y/x=? 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20