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Math problem 4

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TheWorldNewsOrg -
Carmen Kriegler -

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I found only one solution:

Paul is 18, Patricia is 20 and Daniel is 25 years old.

My way of solution:

a= Paul, b=Patricia, c=Daniel

I: a+2=b

II: 1.25*b=c

III: c-10=1.5*(b-10)


II+III: 1.25b=1.5*b-(1.5*10)+10    => b=20

II': 1.25*20=c=25

I': a=b-2=20-2=18

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