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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Let x,y and z represent no. of pens with mohit,ram and sam respectively so x+y=20 z-y=7..(1) x-z=2...(2) therefore add (1) and (2) x-y=9 x+y=20 ----------------- 2x=29 x=29/2 y=11/2 there can't be 11/2 pens please check ur question