document.write( "Question 826913: Amy is 4 years younger than Carlos. Seven years ago Carlos was twice as old as Amy was then. How old is each now \n" ); document.write( "
Algebra.Com's Answer #498329 by stanbon(75887)\"\" \"About 
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Amy is 4 years younger than Carlos. Seven years ago Carlos was twice as old as Amy was then. How old is each now
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\n" ); document.write( "Equations:
\n" ); document.write( "a = c - 4
\n" ); document.write( "c-7= 2(a-7)
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\n" ); document.write( "Substitute for \"a\" and solve for \"c\":
\n" ); document.write( "c-7 = 2(c-4-7)
\n" ); document.write( "c-7 = 2c-22
\n" ); document.write( "c = 15 (Carlos' age now)
\n" ); document.write( "----
\n" ); document.write( "Solve for \"a\":
\n" ); document.write( "a = c - 4
\n" ); document.write( "a = 15-4
\n" ); document.write( "a = 11 yrs (Amy's age now)
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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