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2015-04-08T12:30:27+05:30

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Cost of a bat :  Rs x
cost of a ball :  Rs y

   3 bats  and  6  balls  cost:  Rs 3, 900 = 3 x + 6 y    --- equation 1
           also,  Rs 1, 300 =  x + 3 y                     --- equation  2

algebraically the above equations represent the situation.
     eq 1  - 2 *  eq 2  =  1300  = x          and then     y = 0


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