document.write( "Question 942108: 15 years from now, Johnny's age will be twice his age 10 years ago. What is his current age?\r
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Algebra.Com's Answer #574303 by macston(5194)\"\" \"About 
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Johnny's age=J
\n" ); document.write( "J+15=2(J-10)
\n" ); document.write( "J+15=2J-20 add 20 to both sides
\n" ); document.write( "J+15+20=2J-20+20
\n" ); document.write( "J+35=2J Subtract J from each side
\n" ); document.write( "J+35-J=2J-J
\n" ); document.write( "35=J ANSWER Johnny is 35 years old\r
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\n" ); document.write( "15 years from now Johnny is 50, which is twice his age 10 years ago(35-10=25 years)\r
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