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Sagot :
Answer:
Step-by-step explanation:
q+n=25
n=25-q
25q+5n=505, using n=25-q in this equation gives you
25q+5(25-q)=505
25q+125-5q=505
20q+125=505
20q=380
q=19
So 19 of the coins are quarters.
Answer:
John has 19 quarters out of 25 coins.
Step-by-step explanation:
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