if abc x,y,z all are real number and a2+b2+c2=25 x2+y2+z2=36 ax+by+cz=30 find the value of a+b+c/x+y+z
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a2+b2+c2=25
2(a+b+c)=25
a+b+c=25/2=12.5
x2+y2+z2=36
2(x+y+z)=36
x+y+z=36/2=18
Therefore, a+b+c/x+y+z=
12.5/18
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