Question: Adam has 50 balls. 20 balls are red, 10 are blue, and the rest are either pink or orange. If there are 3 times as many pink as orange balls, how many orange balls are there? Think carefully first, then make a decision:
Adam has a total of 50 balls - 20 red - 10 blue = 20 pink and orange balls combined. If we let x be the total number of orange balls, we know that 3x is the number of pink balls. Therefore, 20 balls = x + 3x = 4x. The number of orange balls, x, is 20 balls / 4 = 5 balls. So the answer is 5.