Pg 633 (565) - Q12
Assuming that a red token is worth r points, and a blue token is
worth b points, you can set up these two equations from the information
given: 2r + 4b = 24 and 3r + 2b = 16.
You can solve this system of equations by multiplying the second
equation by 2 to get 6r + 4b = 32. Subtracting the two equations
cancels out the b’s and yields 4r = 8, so r = 2. You can then plug
2 in for r in either of the original equations to solve for b, which
turns out to be 5, which is choice C.