Question 676204
Let {{{A}}} = the amount he deposited in the account 
His annual interest is 3.5%, so in 1 year
he makes {{{ .035A }}} in interest
In 5 years he will make {{{ 5*.035*A = .175A }}}
given:
{{{ .175A = 2625 }}}
{{{ A = 2625 / .175 }}}
{{{ A = 15000 }}}
He deposited $15,000 5 years ago