The tickets for a school's mooncake festival celebrations were sold at $4 per child and $7 per adult.<br>$4030 was collected for the celebrations.<br>The ratio of the number of children tickets sold to the number of adult tickets sold was 5 : 6. <hr> Find the number of adult tickets sold. <br> <input min="0" type="number" id ="imp6pg096q5_1" class="lineinput" placeholder="?" />