SOLUTION: Hello, I would just like to thank you for helping me solve this. I have been trying to understand the question with no luck Bobby has twice as many 10 centavo coins as 25 centavo

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Question 971977: Hello, I would just like to thank you for helping me solve this. I have been trying to understand the question with no luck
Bobby has twice as many 10 centavo coins as 25 centavo coins, amounting to P6.75 in all. How many coins does he have?

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
d and q, if 100 centavos makes 1 P;
system%28d%2Fq=2%2C0.10d%2B0.25q=6.75%29

system%28d=2q%2C2d%2B5q=135%29

2%282q%29%2B5q=135--------solve for q, first...