SOLUTION: What was johns age 4 years ago if he will be z years old in 5 years

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Question 1034367: What was johns age 4 years ago if he will be z years old in 5 years
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
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Current age=z-5 years
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Age 4 years ago=current age-4 years
Age 4 years ago=(z-5 years)-4 years
Age 4 years ago=z-9 years
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