document.write( "Question 752597: Gerry is 3 years older than Carlo. Carlo is 3 years older than Tina. How old is Tina if the sum of all their ages is 21? \n" ); document.write( "
Algebra.Com's Answer #457880 by carealotqueen(2)\"\" \"About 
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Tina--> (6+x)+(3+x)+x=21
\n" ); document.write( "-------> 3x+9=21
\n" ); document.write( "-------> 3x=12
\n" ); document.write( "-------> x=4
\n" ); document.write( "Tina is 4 years old
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