Two pens and three pencils cost Rs 86. four Pens and a pencil cost Rs. 112. find the cost of a pencil.  Choose the correct choice from the following answers:
A) 10
B) 11
C) 12
D) 13
E) 14
1 pen cost x,let 1 pencil cost y   2x+3y=86, ...y=(86-2x)/3   again,   4x+y=112   4x+(86-2x)/3=112   12x+86-2x=336   10x=250   x=25,   y=(86-50)/3= 
<gadget id="calculator">(86-50)/3</gadget>
<output>12</output>
12   ANSWER:12
<result>C</result>
Two pens and three pencils cost Rs 86. four Pens and a pencil cost Rs. 112. find the cost of a pencil.