解方程X+Y+Z=63,300X:500y:600Z=1:1:1
问题描述:
解方程X+Y+Z=63,300X:500y:600Z=1:1:1
答
由300x:500y:600z=1:1:1,可得300x=600z,500y=600z,所以x=2z,y=(6/5)z。代入x+y+z=63。解得z=15,x=30,y=18。用手机纯手打,希望能帮助。
答
X=30
Y=18
Z=15
答
300X:500y:600Z=1:1:1
3X:5y:6Z=1:1:1
3x:5y=1:1
x=5y/3
5y:6Z=1:1
z=5y/6
x+y+z=63
5y/3+y+5y/6=63
10y/6+y+5y/6=63
21y/6=63
y/6=3
y=18
x=5y/3=18*5/3=30
z=5y/6=18*5/6=15
所以x=30,y=18,z=15
答
300X:500y:600Z=1:1:1
3x=5y=6z
X+Y+Z=63即x+3/5x+1/2x=63
x=30
故y=18 z=15