document.write( "Question 1034367: What was johns age 4 years ago if he will be z years old in 5 years \n" ); document.write( "
Algebra.Com's Answer #648993 by macston(5194)\"\" \"About 
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\n" ); document.write( "Current age=z-5 years
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\n" ); document.write( "Age 4 years ago=current age-4 years
\n" ); document.write( "Age 4 years ago=(z-5 years)-4 years
\n" ); document.write( "Age 4 years ago=z-9 years
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