Question 1166386
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If Mr Jones was  4 times as as old as his daUGHter 5 years ago. how old is Mr Jones If the sum of there age is 55 years?
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j, Mr. Jones
d, his daughter


{{{system(k=4,p-5,t=55)}}}


First sentence, {{{j-p=k(d-p)}}}
Second sentence, {{{j+d=t}}}


Question asks for j.
{{{j-p=k(t-j-p)}}}
{{{j-p=kt-kj-kp}}}
{{{j+kj-p=kt-kp}}}
{{{j(1+k)=p+kt-kp}}}
{{{highlight(j=(p+kt-kp)/(k+1))}}}



{{{j=(5+4*55-4*5)/(4+1)}}}


{{{highlight(j=41)}}}