Question

The cost of 6 pens and 3 pencils is 84 one third of the cost one pen is equal to the cost of pencil

Answer 1

let the price of one pen be x

and the price of one pencil will be (1/3)x

then ,

6x + 3(1/3x)=84

6x + 1x=84

7x=84

x=84/7

x=12

so the price of one pen is 12

and the price of one pencil is 1/3×12 = 4