Question
The total cost of a ring, a radio and a calculator is $225. The radio costs thrice as much as the calculator. The ring costs seven times as much as the radio. Find the difference in the cost between the ring and the radio.
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The total cost of a ring, a radio and a calculator is $225. The radio costs thrice as much as the calculator. The ring costs seven times as much as the radio. Find the difference in the cost between the ring and the radio.