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Andy had \( {4 \over 5}{}{}\)as many marbles as Tom. Andy then gave \( {5\over 8}{}{}\)of his marbles to Tom. Tom then had 204 more marbles than Andy. How many marbles did Andy have at first?

 Aug 22, 2021
edited by Guest  Aug 22, 2021
edited by Guest  Aug 22, 2021
edited by KINGCASH  Aug 22, 2021
 #1
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+2
Andy Tom
Let A be the number Andy starts with Let T be the number that tome starts with
0.8T T
0.8T  - 5/8(0.8T)  T  +  5/8(0.8T)
0.8T  -  0.5T T + 0.5T
0.3T 1.5T

 

Now

1.5T=0.3T+204

1.2T=204

T=170

A=0.8*T = 0.8*170 = 136

 Aug 24, 2021

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