document.write( "Question 1057264: The brother is 5 years older then his sister in 15 years the sum of their ages will be 61 \n" ); document.write( "

Algebra.Com's Answer #672311 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = his sister's age now
\n" ); document.write( " $\"+x+%2B+5+\"$ = brother's age now
\n" ); document.write( " $\"+x+%2B+15+\"$ = his sister's age in 15 yrs
\n" ); document.write( " $\"+x+%2B+20+\"$ = brother's age in 15 yrs
\n" ); document.write( "------------------------------------
\n" ); document.write( " $\"+x+%2B+15+%2B+x+%2B+20+=+61+\"$
\n" ); document.write( " $\"+2x+=+61+-+35+\"$
\n" ); document.write( " $\"+2x+=+26+\"$
\n" ); document.write( " $\"+x+=+13+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+x+%2B+5+=+18+\"$
\n" ); document.write( "------------------
\n" ); document.write( "Sister is 13 now
\n" ); document.write( "Brother is 18 now
\n" ); document.write( "-------------------
\n" ); document.write( "check answer:
\n" ); document.write( " $\"+13+%2B+15+=+28+\"$
\n" ); document.write( " $\"+18+%2B+15+=+33+\"$
\n" ); document.write( " $\"+28+%2B+33+=+61+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

\n" );