求x,y的值,使3(0.5x-1)-8y=-x+0.5y=-7(写出解题过程)
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/31 12:26:39
![求x,y的值,使3(0.5x-1)-8y=-x+0.5y=-7(写出解题过程)](/uploads/image/z/2988039-39-9.jpg?t=%E6%B1%82x%2Cy%E7%9A%84%E5%80%BC%2C%E4%BD%BF3%280.5x-1%29-8y%3D-x%2B0.5y%3D-7%28%E5%86%99%E5%87%BA%E8%A7%A3%E9%A2%98%E8%BF%87%E7%A8%8B%29)
x@_ŒVUTIwa35`c#X%E+h"V3wd{:<jf2fUT8+Yџ1F404Z_{/dn_ђ"1
ܐqR g,FZlث{ [c\4JQt)da,[,RLiY\5IZŝFV6Ł輟"Ow2wmGo'
:3
求x,y的值,使3(0.5x-1)-8y=-x+0.5y=-7(写出解题过程)
求x,y的值,使3(0.5x-1)-8y=-x+0.5y=-7(写出解题过程)
求x,y的值,使3(0.5x-1)-8y=-x+0.5y=-7(写出解题过程)
3(0.5x-1)-8y=-7 ①
-x+0.5y=-7 ②
化简①:1.5x-3-8y=-7
1.5x-8y=-4
3x-16y=-8 ③
化简②:-2x+y=-14 ④
③*2::6x-32y=-16 ⑤
④*3:-6x+3y=-42 ⑥
⑤+⑥:-29y=-58
y=2
代入④:-2x+2=-14
x=8
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
3(x-5)-8y=-x-(-0.5y)=7,求x,y的值
已知x-y=1,求[(x+2y)²+(2x+y)(x-4y)-3(x+y)(x-y)]÷y的值
已知x-y=1,求[(x+2y)^2+(2x+y)(x-4y)-3(x+y)(x-y)]除以y的值大神们帮帮忙
(-x+6):(x-y);(4x+y)=3;14:1,求x+y的值.
(x+y)+(2x+0.5y)+(3x+1/6y)+...+(9x+1/72y),当x=2,y=9时,求代数式的值
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
已知(3x+1)(3x-3)-3x+2)^2=-7,(y+7)(y-7)-y(y-7)=0,求8y^2-5y(-y+3x)+4y(-4y-5/2x)的值
已知x,y为正整数,并且x*y+x+y=71,x*x*y+x*y*y=880,求3*x*x+8*x*y+3*y*y的值
已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y)^2-2y(x-3y)]÷4y的值
2x+3y-1=y-x-8=x+6求2x-y的值
已知x-y=3,求[(x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
1 已知x+y/y=7/3 求x+y/x-y等于什么2 若x+4/3=y+3/2=z+8/4 且x+y+z=12 求x、y、z的值
已知x-y/y=8/3,求x+y/y的值
X+Y-8X+10Y+41=O,求X/Y-Y/X的值
已知x-y=8,(x+y)(x-y)=32,求x,y的值
求x,y的值,使3(0.5x-1)-8y=-x+0.5y=-7(写出解题过程)
|x-y+3|与|x+y-1999|互为相反数,求x+y/x-y的值