Amon & Rhonda combined have 215 marbles. If Amon owns 55 marbles more than Rhonda, how many marbles does Rhonda have?
Use reasoning to answer the following question.
80
Let's say Rhonda has m marbles.

The total number of marbles that Ammon has is m + 55.

Amon & Rhonda combined have m + (m + 55) = 215.

This means the total number of marbles they have together is 2m + 55 = 215.

2m = 215 - 55.

The total number of marbles that Rhonda has is m = 160 / 2.

Rhonda has m = 80 marbles.

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The answer: 80