document.write( "Question 936686: If you add the age of a man to the age of his wife, the result is 91. He is now twice as old as she was when he was as old as she is now. \n" ); document.write( "
Algebra.Com's Answer #570153 by TimothyLamb(4379)\"\" \"About 
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x = man age now
\n" ); document.write( "y = woman age now
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\n" ); document.write( "x + y = 91
\n" ); document.write( "x = 2(y - (x - y))
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\n" ); document.write( "put the system of linear equations into standard form
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\n" ); document.write( "x + y = 91
\n" ); document.write( "x = 2y - 2x + 2y
\n" ); document.write( "---
\n" ); document.write( "x + y = 91
\n" ); document.write( "3x - 4y = 0
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\n" ); document.write( "copy and paste the above standard form linear equations in to this solver:
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\n" ); document.write( "solution:
\n" ); document.write( "x = man age now = 52
\n" ); document.write( "y = woman age now = 39
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\n" ); document.write( "Solve systems of linear equations up to 6-equations 6-variables:
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