document.write( "Question 945859: 3 friends, a, b and c. b is 4 years older than a. c is 8 years younger than a. their three ages total 44. how old are a, b and c? \n" ); document.write( "
Algebra.Com's Answer #576996 by TimothyLamb(4379)\"\" \"About 
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x = age of a
\n" ); document.write( "y = age of b
\n" ); document.write( "z = age of c
\n" ); document.write( "---
\n" ); document.write( "y = x + 4
\n" ); document.write( "z = x - 8
\n" ); document.write( "x + y + z = 44
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form
\n" ); document.write( "---
\n" ); document.write( "x - y = -4
\n" ); document.write( "x - z = 8
\n" ); document.write( "x + y + z = 44
\n" ); document.write( "---
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\n" ); document.write( "---
\n" ); document.write( "solution:
\n" ); document.write( "x = 16
\n" ); document.write( "y = 20
\n" ); document.write( "z = 8
\n" ); document.write( "---
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