document.write( "Question 205935: How can I solve this? pls. help!\r
\n" ); document.write( "\n" ); document.write( "Marie is twelve years older than her brother Ben. Four years from now, Ben will be two-thirds as old as Marie. How old is Ben now?
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Algebra.Com's Answer #155593 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
Let Ben's age be=x & Marie's age be=(x+12)
\n" ); document.write( "In 4 years Ben's age will be (x+4 )
\n" ); document.write( "In 4 years Marie's age will be (x+16)
\n" ); document.write( "So: (x+4)=2/3(x+16)
\n" ); document.write( "(x+4)=(2x+32)/3
\n" ); document.write( "3(x+4)=2x+32
\n" ); document.write( "3x+12=2x+32
\n" ); document.write( "3x-2x=32-12
\n" ); document.write( "x=20 years old is Ben now.
\n" ); document.write( "20+12=32 years old is Marie now.
\n" ); document.write( "Proof:
\n" ); document.write( "20+4=2/3(20+16)
\n" ); document.write( "24=2/3*36
\n" ); document.write( "24=72/3
\n" ); document.write( "24=24
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