SAT Heart of Algebra (No Calculator from SAT #8)

A group of 202 people went on an overnight camping trip, taking 60 tents with them. Some of the tents held 2 people each, and the rest held 4 people each. Assuming all the tents were filled to capacity and every person got to sleep in a tent, exactly how many of the tents were 2-person tents?

• 30

• 20

• 19

• 18

• There are exactly 4 solutions.

• There are exactly 2 solultions.

• There is exactly 1 solution.

• There are no solutions.