(x+2y)/2+(3x-y)/3=5 ① 0.2(x+2y)+0.8(3x-y)=4 ②算这个二元一次方程,一分钟之类的朋友答出来的加财
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 10:24:58
![(x+2y)/2+(3x-y)/3=5 ① 0.2(x+2y)+0.8(3x-y)=4 ②算这个二元一次方程,一分钟之类的朋友答出来的加财](/uploads/image/z/581686-70-6.jpg?t=%EF%BC%88x%2B2y%29%2F2%2B%283x-y%29%2F3%3D5+%E2%91%A0+0.2%28x%2B2y%29%2B0.8%283x-y%29%3D4+%E2%91%A1%E7%AE%97%E8%BF%99%E4%B8%AA%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%2C%E4%B8%80%E5%88%86%E9%92%9F%E4%B9%8B%E7%B1%BB%E7%9A%84%E6%9C%8B%E5%8F%8B%E7%AD%94%E5%87%BA%E6%9D%A5%E7%9A%84%E5%8A%A0%E8%B4%A2)
x͑J@_eMi$ A/魠TREm-bH6 ]d'
nbE jmLpI5v2BJr +M
OcvǂV%?8(Oou438k_(}նv W',Og:ZC3ɲ%UAS99-@_G"aj? *?bԭ.b6Qb#H5K_S$K'KB}jmdMZ@
(x+2y)/2+(3x-y)/3=5 ① 0.2(x+2y)+0.8(3x-y)=4 ②算这个二元一次方程,一分钟之类的朋友答出来的加财
(x+2y)/2+(3x-y)/3=5 ① 0.2(x+2y)+0.8(3x-y)=4 ②
算这个二元一次方程,一分钟之类的朋友答出来的加财
(x+2y)/2+(3x-y)/3=5 ① 0.2(x+2y)+0.8(3x-y)=4 ②算这个二元一次方程,一分钟之类的朋友答出来的加财
(x+2y)/2+(3x-y)/3=5 ① 等式两边乘以6 :3(x+2y)+2(3x-y)=30
再展开合并同类项 变为:9x+4y=30
0.2(x+2y)+0.8(3x-y)=4 ②等式两边乘以10:2(x+2y)+8(3x-y)=40
再展开合并同类项:变为:26x-4y=40
①+ ② 得出:35x=70,x=2,代入,得y=3
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
化简:5(x-y)+2(x+y)-3(x-y)
(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
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
(2x-3y)-(5x-y)
(2X-3y)-(5x-y)
(2x-5y)(3x+y)
(x+y)(2x-3y)=?
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)