x,y,z分别代表三个不同的数,且X+X=x=y+y,y+y+y+y=z+z+z,x+y+y+z=60 ,那么Y+X+Z
2个回答
就是个三元一次方程组,解出来 x=10 y=20 z=15
x+y+z=45
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