At first, Sam and Darren had the same number of Pokemon cards.<br>During a game with some friends, Sam won 15 more cards and Darren lost 24 cards.<br>Now, Sam had 4 times as many Pokemon cards as Darren.<hr> Each of them had <input min="0" type="number" id ="imp5pg014q15_1" class="lineinput" placeholder="?" /> cards at first.