Solve the problem.Mary and her brother John collect foreign coins. Mary has four times the number of coins that John has. Together they have 225 foreign coins. Find how many coins Mary has.
A. 171 coins
B. 45 coins
C. 36 coins
D. 180 coins
Answer: D
Mathematics
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= 
+ 
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+ 
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= 
D. 
= 
+ 
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y = - 
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A. 
B. 
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A. 
B. 
C. 
D. 
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