Question 1166704
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Matthew is 20 years younger than his father, Four years from now, the sum of their agea will be 44.
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Matthew is n years younger than his father. p years from now, the sum of their age will be t.
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{{{system(m=f-n,(m+p)+(f+p)=t)}}}


{{{m+f=t-2p}}}
{{{substitution}}}
{{{f-n+f=t-2p}}}
{{{2f=t-2p+n}}}
{{{highlight(f=(t-2p+n)/2)}}}-----formula for the father's age now


{{{m+f=t-2p}}}
{{{substitution}}}
{{{m+m+n=t-2p}}}
{{{2m=t-2p-n}}}
{{{highlight(m=(t-2p-n)/2)}}}-------formula for Matthew's age now




Father, 28
Matthew, 8