SOLUTION: Sams sister is twice his age. Sams brother is 6 years older than Sam. Their combined age adds up to 36. How is old is Sam, his brother and his sister?

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Hi

Sam + Sister + bother

x   + 2x     + (x+6) = 36

     4x = 30  

Problem Does NOT yield an Whole Number Age for Sam

 7 1/2 + 15 + 13 1/2 = 36