document.write( "Question 290047: John is x years old, his sister Mary is 5X-12 years old. If Mary is two times John's age, write an equation in terms of x to find the age of John. \n" ); document.write( "
Algebra.Com's Answer #217662 by JBarnum(2146)\"\" \"About 
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J=x
\n" ); document.write( "M=5x-12
\n" ); document.write( "M=2J
\n" ); document.write( "M=2x
\n" ); document.write( "2x=5x-12
\n" ); document.write( "_______
\n" ); document.write( "if u want it solved
\n" ); document.write( "12=3x
\n" ); document.write( "4=x
\n" ); document.write( "J=4
\n" ); document.write( "M=5(4)-12
\n" ); document.write( "M=8
\n" ); document.write( "
\n" );