The age of the father is twice the sum of the ages of his two children after 20 years his age will be equal
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let x be the age of father
the childrens be g and k
hence
2(g+k)=x
also
g+k+20=x
{not given what to do so,}
from 1 & 2
2(g+k)=g+k+20
g+k=g+k+20/2
g+k=g+k
hence equation r equivalent
the childrens be g and k
hence
2(g+k)=x
also
g+k+20=x
{not given what to do so,}
from 1 & 2
2(g+k)=g+k+20
g+k=g+k+20/2
g+k=g+k
hence equation r equivalent
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