Two pens and three pencils cost 86. Four pens and a pencil cost 112. What is the difference between the cost of a pen and that of a pencil?  Pick
A) 25	B) 13	C) 19	D) Cannot be determined	E) None of these
Let the cost of a pen and a pencil be ‘x’ and ‘y’ respectively. We have to find (x – y).   From the question,   2x + 3y = 86 ..... (i)   4x + y = 112 ......(ii)   Subtracting (i) from (ii), we get   2x – 2y = 26 or, x – y = 13   Answer 13
<result>B</result>
Two pens and three pencils cost 86. Four pens and a pencil cost 112. What is the difference between the cost of a pen and that of a pencil?