Question
Riordan and Sophia shared a sum of money in the ratio 1 : 2. After Riordan spent $170, the ratio became 2 : 9. How much money did Sophia have?
2 m

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Riordan and Sophia shared a sum of money in the ratio 1 : 2. After Riordan spent $170, the ratio became 2 : 9. How much money did Sophia have?