Question 1123536
<br>
x first places at 5 points each = 5x
2x second places at 3 points each = 6x
2x+8 third places at 1 point each = 2x+8<br>
Total points: 5x+6x+2x+8 = 151<br>
Solve for x.<br>
Then remember the question is the number of third places, which is not x, but 2x+8.