The ratio of Tim's money to Dave's money was 4: 3.<br>After Tim saved another $12 and Dave spent $12 on a book, the ratio of Tim's money to Dave's money became 6 : 1. <hr> How much did Tim have at first? <br> <input min="0" type="number" id ="imp6pg095q2_1" class="lineinput" placeholder="?" />