Question 584152
{{{x}}} = Father's age now
{{{y}}} = Son's age now
{{{ x-5}}} = Father's age 5 yrs ago
{{{ y-5]]] = Son's age 5 yrs ago
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given:
{{{ x - 5 = 7*( y - 5 ) + 2 }}}
{{{ x - 5 = 7y - 35 + 2 }}}
{{{ x - 5 = 7y - 33 }}}
{{{ 7y = x - 5 + 33 }}}
{{{ 7y = x + 28 }}}
{{{ y = (1/7)*x + 4 }}}
Something is wrong with my 
answer or the problem. 
According to this equation,
when the Son is 5, the father is 7.
I don't see what I did wrong, though.