Question

A bag contains purple marbles and blue marbles, 65 in total. The number of purple marbles is 5 more than 3 times the number of blue marbles. How many purple marbles

Answer 1

Lets say there are x blue marbles.

Purple marbles = 5 + 3x
Blue marbles = x
Total = 65

5 + 3x + x = 65
5 + 4x = 65
4x = 65 - 5 = 60
x = 60/4 = 15

Blue marbles = 15

65 - 15 = 50

There are 50 purple marbles.