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Answer this equation in average please:

1. Anne has 40 stamps, Jun-Jun also has 40 stamps, while for Tony, her stamps are unknown. But the 3 children's average of stamps are 45 stamps. Find Tony's average amount of stamps. Guys pls answer! I just made up the question only to get an example of an answer. Please please! my exam's will start tomorrow in MATH! >O<

(also give a solution for me to get SOLUTION PLS!!!!!) :(


(40+40+N)÷3= 45
135-80= N

Hope that will help :) 
1 5 1
thak you so much! ^O^
Your always welcome :D
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