document.write( "Question 624555: steven is 13 years older than his sister sarah. together they are 28 years old. how old is steven and how old is sarah?\r
\n" ); document.write( "\n" ); document.write( "pleaseeee help me i need this done for my math summer homework! im going into sixth grade! please help and thank you!
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Algebra.Com's Answer #392844 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Let \"+a\" = Steven's age
\n" ); document.write( "Let \"+b+\" = Sarah's age
\n" ); document.write( "given:
\n" ); document.write( "(1) \"+a+=+b+%2B+13+\"
\n" ); document.write( "(2) \"+a+%2B+b+=+28+\"
\n" ); document.write( "---------------
\n" ); document.write( "Substitute (1) into (2)
\n" ); document.write( "(2) \"+b+%2B+13+%2B+b++=+28+\"
\n" ); document.write( "(2) \"+2b+%2B+13+=+28+\"
\n" ); document.write( "Subtract \"+13+\" from both sides
\n" ); document.write( "(2) \"+2b+=+28+-+13+\"
\n" ); document.write( "(2) \"+2b+=+15+\"
\n" ); document.write( "(2) \"+b+=7.5+\"
\n" ); document.write( "and, since
\n" ); document.write( "(1) \"+a+=+b+%2B+13+\"
\n" ); document.write( "(1) \"+a+=+7.5+%2B+13+\"
\n" ); document.write( "(1) \"+a+=+20.5+\"
\n" ); document.write( "Steven is 20 yrs 6 mos old
\n" ); document.write( "Sarah is 7 yrs 6 mos old
\n" ); document.write( "check answer:
\n" ); document.write( "Do ages add up to \"+28+\" ?
\n" ); document.write( "Is the difference \"+13+\" ?
\n" ); document.write( "Yes
\n" ); document.write( "
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