document.write( "Question 549002: Alice is 4 years younger than Ben and 9 years older than Carly their combined ages are 79. How old is Alice \n" ); document.write( "

Algebra.Com's Answer #357608 by JBarnum(2146) $\"\"$ $\"About$

You can put this solution on YOUR website!
i used first letter of their names below
\n" ); document.write( "a=b-4
\n" ); document.write( "a=9+c
\n" ); document.write( "a+b+c=79
\n" ); document.write( "c=a-9
\n" ); document.write( "solve for b
\n" ); document.write( " $\"%28b-4%29%2Bb%2B%28a-9%29=79\"$
\n" ); document.write( " $\"%28b-4%29%2Bb%2B%28%28b-4%29-9%29=79\"$
\n" ); document.write( " $\"3b-17=79\"$
\n" ); document.write( " $\"3b=96\"$
\n" ); document.write( " $\"b=32\"$
\n" ); document.write( "a=b-4
\n" ); document.write( " $\"a=32-4\"$
\n" ); document.write( " $\"a=28\"$
\n" ); document.write( " \n" ); document.write( "

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