Jim has a total of 77 red and blue marbles. The number of blue marbles is 5 more than twice the number of red marbles. How many red marbles are there?

6 answers

R = red marbles

R + 2R + 5 = 77

3R + 5 = 77

3R = 72

R = 24
R + 2R + 5 = 77
3R + 5 = 77
3R = 72
R = 24
R = red marbles