document.write( "Question 517018: Nina is 11 years older than Nene. The sum of their age is 39. How old are they now? \n" ); document.write( "
Algebra.Com's Answer #344597 by jessica43(140)\"\" \"About 
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To solve this problem you need to write what you know in equations. First, you know that Nina is 11 years older than Nene: I = 11 + E
\n" ); document.write( "Second, you know that the sum of their ages is 39: I + E = 39
\n" ); document.write( "Now plug the first equation into the second for I:
\n" ); document.write( "I + E = 39
\n" ); document.write( "(11 + E) + E = 39
\n" ); document.write( "11 + 2E = 39
\n" ); document.write( "2E = 28
\n" ); document.write( "E = 14
\n" ); document.write( "So Nene is 14. To find Nina's age, use the first equation:
\n" ); document.write( "I = 11 + E
\n" ); document.write( "I = 11 + 14
\n" ); document.write( "I = 25
\n" ); document.write( "So Nina is 25.
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