User Forum

Subject :IMO    Class : Class 6

Supriya had Rs 70. After buying 5 identical pencils, she has Rs y left. The cost of 1 pencil in terms of y is _______.

A
B
CRs (70 - 5y)
D


Ans 1:

Class : Class 6
let each pencil costs x. So 5 pencil costs 5x Therefore 70-5x = y or -5x= y-70 or 5x=70-y or x= (70-y)/5

Ans 2:

Class : Class 6
let each pencil costs x. So 5 pencil costs 5x Therefore 70-5x = y or -5x= y-70 or 5x=70-y or x= (70-y)/5

Ans 3:

Class : Class 6
let each pencil costs x. So 5 pencil costs 5x Therefore 70-5x = y or -5x= y-70 or 5x=70-y or x= (70-y)/5

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