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1 year, 3 months ago
1 year, 3 months ago
Assuming he spent 150 on the total purchase (though you have mentioned 15), the equation that can be formed is 24x+21y=150, cancelling out the factor 3, we get 8x+7y=50, the integral solution of this is 1,6 i.e., 1 pen and 6 pencils, so a total of 7.
Hope that helps.
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