x:y=2:3 x:z=5:4 x+y+z=33

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/10 20:36:16
x:y=2:3 x:z=5:4 x+y+z=33
xRJ0g,mB)E?@̉n L6ځ/N[1%'6iWsr=tbB-byذ.0B1 7\U}y rΛH g@ݫq֡!q|8,䉝$6#J(1UAY_]4z61w$PFHjOWӖ4UC/lJ#M5 c~,ze×v~l{1H0|S}d~]ަm[enC!LV&AGLbpc@Fj| Qv4#

x:y=2:3 x:z=5:4 x+y+z=33
x:y=2:3 x:z=5:4 x+y+z=33

x:y=2:3 x:z=5:4 x+y+z=33
∵x:y=2:3
x=2/3y
∴y=3/2x
∵x:z=5:4
x=5/4z
∴z=4/5x
把y=3/2x,z=4/5x代入x+y+z=33中
得x+3/2x+4/5x=33
10+15x+8x=330……………………两边同时乘以10
33x=330
∴x=10
{ y=3/2x=15
z=4/5x=8
如果能对你有所帮助,请点击该页面的“选为满意回答”,

y=3x/2,z=4x/5
代入x+y+z=33得
x+1.5x+0.8x=33
3.3x=33
x=10
代入x:y=2:3得
10：y=2:3
2y=30
y=15
代入x+y+z=33得
10+15+z=33
z=8

(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian x+y=5 2x+3y-z=9 x-y+z=4 设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值 (4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊 x/2=y/3=z/5 x+3y-z/x-3y+z x+y/2=z+x/3=y+z/4 x+y+z=27 x+2y=3x+2z=4y+z 求x:y:z 已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 已知：4x-5y+2z=0 x+4y-3z=0则：(x*x+y*y+z*z)/(x*y+y*z+z*x)=____. 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z {5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=-1 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) x:y=2:3 x:z=5:4 x+y+z=33 3x-2y+z=4 x+y-z=5 4x-4y+3z=27 ｛ 5x-3y+z=25x+2y-4z=3-5x+y-z=2 x+y+z=4 2x-y+z=3 3x-2y-3z=-5 x:y:z=3:4:5 2x-3y+2z=8 x-y-2z=?