Mary's age is twice her brother's age and half her sister's age. How old is Mary, in years, if the sum of the three ages is 28 years?

cryptoaops Mar 3, 2021

#1

#5**0 **

Hm, make an acct and message (web2.0calc.com/messagecenter/cryptoaops). talk like that instead.

cryptoaops
Mar 3, 2021