document.write( "Question 247108: John is twice as old as Lubert. In 3 yrs, John will be 13 yrs less than twice as old as Lubert. Find their present ages. (Is this problem correct?) \n" ); document.write( "

Algebra.Com's Answer #180411 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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John is twice as old as Lubert. In 3 yrs, John will be 13 yrs less than twice as old as Lubert. Find their present ages. (Is this problem correct?)
\n" ); document.write( ":
\n" ); document.write( "It is NOT correct, try to do it:
\n" ); document.write( ":
\n" ); document.write( "J is twice as old as L.
\n" ); document.write( "j = 2L
\n" ); document.write( ":
\n" ); document.write( "In three years, J will be 13 years less than twice as old as L.
\n" ); document.write( "j + 3 = 2(L+3) - 13
\n" ); document.write( "j + 3 = 2L + 6 - 13
\n" ); document.write( "j = 2L - 7 - 3
\n" ); document.write( "j = 2L - 10
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\n" ); document.write( "Find their ages now.
\n" ); document.write( "replace j with 2L (from the 1st statement)
\n" ); document.write( "2L = 2L - 10
\n" ); document.write( "obviously, this is not possible. \n" ); document.write( "

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