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OpenStudy (anonymous):
Marcy has a total of 100 dimes and quarters. If the total value of the coins is $14.05, how many dimes and quarters does she have?
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hartnn (hartnn):
Let q equal the number of quarters and d equal the number of dimes. Since total coins = 100, q + d = 100 -----Equation (1) At 25¢ for each q, the value of the quarters is 25q. At 10¢ for each d, the value of the dimes is 10d. Together they add up to 1405¢ so, other equation will be 25q + 10d = 1405 ----Equation (2) got these 2 equations ?? can you solve them ?
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