方程组:X/7=Y/10=Z/5,X+2Y+3Z=84
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方程组:X/7=Y/10=Z/5,X+2Y+3Z=84
方程组:X/7=Y/10=Z/5,X+2Y+3Z=84
方程组:X/7=Y/10=Z/5,X+2Y+3Z=84
![方程组:X/7=Y/10=Z/5,X+2Y+3Z=84](/uploads/image/z/15592617-9-7.jpg?t=%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9AX%2F7%3DY%2F10%3DZ%2F5%2CX%2B2Y%2B3Z%3D84)
x/7=y/10=z/5=k
x=7k,y=10k,z=5k代入x+2y+3z=84,
7k+20k+15k=84
42k=84
k=2
x=7k=14;
y=10k=20;
z=5k=10.
不懂的欢迎追问,
x=7k,y=10k,z=5k代入x+2y+3z=84,
7k+20k+15k=84
42k=84
k=2
x=7k=14;
y=10k=20;
z=5k=10.
不懂的欢迎追问,
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