document.write( "Question 713078: Michael is 15 years older than his brother Rafael. However, y years ago Michael was twice as old as Rafael. If Rafael is now x years old and x > y, what is the value of x-y? \n" ); document.write( "
Algebra.Com's Answer #438291 by ankor@dixie-net.com(22740)\"\" \"About 
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Michael is 15 years older than his brother Rafael.
\n" ); document.write( " However, y years ago Michael was twice as old as Rafael.
\n" ); document.write( " If Rafael is now x years old and x > y, what is the value of x-y?
\n" ); document.write( ":
\n" ); document.write( "\" Michael is 15 years older than his brother Rafael.\" Rafael is x
\n" ); document.write( "m = x + 15
\n" ); document.write( ":
\n" ); document.write( "\"y years ago Michael was twice as old as Rafael.\"
\n" ); document.write( "m - y = 2(x - y)
\n" ); document.write( "m - y = 2x - 2y
\n" ); document.write( "m = 2x - 2y + y
\n" ); document.write( "m = 2x - y
\n" ); document.write( "Replace m with (x+15)
\n" ); document.write( "x + 15 = 2x - y
\n" ); document.write( "15 = 2x - x - y
\n" ); document.write( "15 = x - y
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