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Solution to puzzle 79 - shopping

 This was the  puzzle

Let us say I spent b rupees on bag, s1 rupees on saree and s2 rupees on shoes.
Total amount = 1400 = b+s1+s2   -----(1)
s1 = 900+b -- as saree cost 900 more than bag
s1 +b  = s2+1200 --- (2)      as saree and bag cost 1200 more than shoes. 

b = s1-900.
Substituting b in the first equation, we get  
1400 = 900+b+b+s2
500 = 2b+s2 --------(3)
Substituting s1 = b+900 in equation 2, we get
b+900+b =s2+1200
300  = 2b-s2 ---------(4)
Adding 3 and 4 we get
800 = 4b
b = 800/4 = 200
s1 = b+900 = 1100
s2 = 1400 - s1 - b = 100
 
Saree cost rupees 1100, shoes cost rupees 100 and bag cost rupees 200. 




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