Alonzo received a gift card of $60 for a pizza restaurant. The restaurant charges $5 per pizza. Ivanna received a gift card of $100 for a different pizza restaurant. The restaurant charges $10 per pizza. Let x be the number of pizzas purchased. (a) For each card, write an expression for the amount of money left on the card after purchasing x pizzas. Write an equation to show when the two cards would have the same amount of money left on them