2X+6Y=10,2X+3Y=5.5,求x,
2个回答
2X+6Y=10.1,
2X+3Y=5.5.2,
1式-2式得
3Y=4.5
Y=1.5.3
将3式代入1式得
2X+6*1.5=10
2X=1
X=0.5
相关问题
1.8x+5y=10 8x-5y=10 2.3x+2y=9 4x-2y=5 3.2x+3y=5 6x-2y=-6 4.3
若|y+5|+(5x+1)^2=0,求-3(2x-y)-{7x-[6x+2y-(10x-8y)]-x-2(3x-4y)}
若|y+5|+(5x+1)2=0,求-3(2x-y)-{7x-[6x+2y-(10x-8y)]-x-2(3x-4y)}的
{x/60+y/80=10,x/60+y/40=15、{2x/3+3y/4=1/5,5x/6-5y/2=2、{5/2(x
(1){5x-3y=5 6x+2y=6 (2){3x+2y=5x+2 2(3x+2y)=2x+8(3){x+3/3+y+
x/3y=y/2x-5y=6x-15y/x,求(4x^2-5xy+6y^2)/(x^2-2xy+3y^2)的值
5x+2y=12,3x+2y=-6,求x= ,y=
若丨2x-5丨+(2x-5y+20)^2=0,求代数式(-2x^2)-2x(5y-2x)=3y(6x-5y)-3y(4x
(4.5*10^5)(2*10^3)(3*10^4)&2x^2y(-8y^2)+4x^2y*5y^2&(x+3y)(2x
2X/3-3Y/4=1/5 5X/6-5Y/2=2求X与Y值