Chandler goes miniature golfing. If he pays $4.50 for an admission ticket and $3.25 for each round he golfs, and the total amount he pays for admission and rounds is $26.25, which equation can be used to determine the number of rounds, x, that Chandler golfs?
a) $4.50x + $3.25 = $26.25
b) $4.50 + $3.25x = $26.25
c) $3.25x - $4.50 = $26.25
d) $26.25 = $4.50 + $3.25x