Since the dining table costs thrice as much as 1 chair, it means that the dining table is 3units and the chair is 1 unit. Total of 6 chairs makes up 6 units. A Dining table and 6 chairs = 6+3=9units. Since total price is $1512, 9 units is $1512. To find 1 unit, you take $1512 divided by 9 units and you will get $168. Then you will be able to
Find the price of the table which costs 3 units.