Tony misplaced 777 stamps from his collection. He knows that each stamp of his is worth \$0.15$0.15dollar sign, 0, point, 15 and that the total value of them is now only \$5.55$5.55dollar sign, 5, point, 55.
Write an equation to determine the number of stamps (s)(s)left parenthesis, s, right parenthesis that Tony originally had.