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Mathematics 14 Online
OpenStudy (anonymous):

Mary and her brother John collect foreign coins. Mary has three times the number of coins that John has. Together they have 180 foreign coins. Find how many coins Mary has.

OpenStudy (anonymous):

3x=180 solve for x

OpenStudy (anonymous):

M+J=180 mary's coins =3*jhon'coin hence 3*c+c=4c 4c=180 c=45 john 45 coins mary 135 coins

OpenStudy (anonymous):

thankyouu !

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