document.write( "Question 74392: jon is twice as old as his sister, jane, less 4 years. jon is 18 years old. how old is jane? \n" ); document.write( "

Algebra.Com's Answer #53402 by cathieb1225(41) $\"\"$ $\"About$

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x is Jane's age;2x-4 is Jon's age. Because he is 18 years old, the equation would be 2x-4=18.
\n" ); document.write( "2x-4=18
\n" ); document.write( "Add 4 to both sides of the equation
\n" ); document.write( "2x-4+4=18+4
\n" ); document.write( "2x=22
\n" ); document.write( "Divide both sides by 2
\n" ); document.write( "2x/2=22/2
\n" ); document.write( "x=11
\n" ); document.write( "Jane is 11 years old.
\n" ); document.write( "To check your answer, substitute 11 for x. 2(11)-4=18
\n" ); document.write( " 22-4=18
\n" ); document.write( " 18=18 \n" ); document.write( "

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