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How many coins does Betty have if she has 3.45 in dimes and quarters she has 10 more dimes than quarters?
Wiki User
∙ 14y ago
Total coins = D + Q.
10 x D + 25 x Q = 345 and D = Q + 10 so 10 x (Q + 10) + 25 x Q = 345
ie 10Q + 100 + 25Q = 345
ie 35Q = 245
ie Q = 7 so D = 17
Check: 7 x 25 + 17 x 10 = 175 + 170 = 345. That'll do nicely.
Wiki User
∙ 14y ago
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