x+y=6,0.25x+0.4y=6*0.3解方程组
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/27 10:46:21
x+y=6,0.25x+0.4y=6*0.3解方程组
x+y=6,0.25x+0.4y=6*0.3
解方程组
x+y=6,0.25x+0.4y=6*0.3解方程组
y=6-x
代入0.25x+0.4y=6*0.3
0.25x+2.4-0.4x=1.8
0.15x=0.6
所以x=4
y=6-x=2
X=4,Y=2
x+y=6①
0.25x+0.4y=6*0.3②
①×0.4
0.4x+0.4y=2.4③
③—②
0.15x=0.6
x=4
把x=4带入①
4+y=6
y=2
解得x=4,y=2
(5x-6y)(x+y)=0(x不等于y),则y/x=
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?
x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值
x,y满足x-y+6>=0,x+y>=0,x
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
已知x的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
(x-y)的4次方/(y-x)的3次方+(x-y)0的次方*(y-x)+(-x-y)7次方/(x+y)6次方=
已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
y=-6/x (x
已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的值
已知x²+y²+6x-8x+25=0,求(x/x²-y² - 1/x+y)÷y/y-x
{x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0
方程式 y=x+6 x=y*0.4 求解
x^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以(x^2+y^2/y)^2的值
(x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5
{6/x+y+10/x-y=30 6/x+y-10/x-y=-1