Please kindly help me solve this word problem with model solution. Tq

by Theresia
(Jakarta, indonesia)

Ben and Jon had $270 altogether. Ben decided to give a quarter of what he has in exchange for a third of what Jon has. As a result of the exchange, they both had an equal amount of money.

How much did Ben have at first?

Here's My Answer
by Zach
(Singapore)

This question involves the Constant Total Concept.

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