document.write( "Question 813739: Martha is 1 year older than twice his sisters age. The difference of their ages is 8. Find their present ages \n" ); document.write( "
Algebra.Com's Answer #489935 by tommyt3rd(5050)\"\" \"About 
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1) M=2S+1
\n" ); document.write( "2) M-S=8\r
\n" ); document.write( "\n" ); document.write( "setting the equations up to solve...
\n" ); document.write( "M-2S=1
\n" ); document.write( "-M+S=-8\r
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\n" ); document.write( "\n" ); document.write( "-S=-7\r
\n" ); document.write( "\n" ); document.write( "S=7
\n" ); document.write( "M=2(7)+1=15\r
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