document.write( "Question 787737: Twice Sally's age increased by 3 times Sue's age is 103. Five times Sally's age decreased by 4 times Sue's age is 16. How old will Sally be ten years from now? \n" ); document.write( "
Algebra.Com's Answer #478394 by ankor@dixie-net.com(22740)\"\" \"About 
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Twice Sally's age increased by 3 times Sue's age is 103.
\n" ); document.write( " Five times Sally's age decreased by 4 times Sue's age is 16.
\n" ); document.write( " How old will Sally be ten years from now?
\n" ); document.write( ":
\n" ); document.write( "Let x = Sally's present age
\n" ); document.write( "Let y = Sue's present age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement:
\n" ); document.write( " \"Twice Sally's age increased by 3 times Sue's age is 103.\"
\n" ); document.write( "2x + 3y = 103
\n" ); document.write( ":
\n" ); document.write( "\"Five times Sally's age decreased by 4 times Sue's age is 16.\"
\n" ); document.write( "5x - 4y = 16
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\n" ); document.write( "To use elimination here, multiply the 1st equation by 4, the 2nd by 3:
\n" ); document.write( "8x + 12y = 412
\n" ); document.write( "15x -12y = 48
\n" ); document.write( "------------------addition eliminates y, find x
\n" ); document.write( "23x = 460
\n" ); document.write( "x = 460/23
\n" ); document.write( "x = 20 yr is Sally's present age
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\n" ); document.write( "\" How old will Sally be ten years from now?\"
\n" ); document.write( "I'll let you figure that out \n" ); document.write( "
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