14-01-2018
Mathematics

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chris is five times as old as Zac. in thirty years chris will be twice zac's age. how old is zac now?

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Vidyadharan Vidyadharan

14-01-2018

Zac's age=x
Chris's age=5x

After 30 years
Zac's age=x+30
Chris's age =5x+30=2(x+30)
5x+30=2x+60
5x-2x=60-30
3x=30
x=10

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