Answer the following question, with explanation first.
Katie has 13 pink marbles. She has 9 fewer orange marbles than pink marbles. She has 4 times as many purple marbles as orange marbles. How many marbles does Katie have in all?

33
Find the number of orange marbles.

13 marbles - 9 marbles = 4 marbles.

Find the number of purple marbles.

4 marbles x 4 = 16marbles.

Find the total amount of pink, orange, and purple marbles.

13 marbles + 4 marbles + 16 marbles = 45 marbles.

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The answer is 33