document.write( "Question 1002306: Mother is three times as old as her son. Ten years from now, mother will be two times as old as her son.how old are they now?\r
\n" ); document.write( "\n" ); document.write( "Please solve this problem involving systems of linear equations in two variables.
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Algebra.Com's Answer #619296 by fractalier(6550)\"\" \"About 
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Call the son's age now, x.
\n" ); document.write( "Call the mom's age now, y.
\n" ); document.write( "y = 3x
\n" ); document.write( "In ten years
\n" ); document.write( "y+10 = 2(x+10)
\n" ); document.write( "Substitute for y in the second equation and get
\n" ); document.write( "3x+10 = 2(x+10)
\n" ); document.write( "3x + 10 = 2x + 20
\n" ); document.write( "x = 10
\n" ); document.write( "y = 30
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