A local restaurant recently renovated its dining space, purchasing new tables and chairs to use in addition to the original tables and chairs. The new tables each seat six customers, while the original tables each seat four customers. Altogether, the restaurant now has 40 tables and is capable of seating 220 customers. How many more new tables than original tables does the restaurant have?
Choose the correct choice.
A) 10 B) 20 C) 30 D) 34 E) 36
X = Number of original tables   Y = Number of new tables   Capacity of original tables = 4   Capacity of new tables = 6   Total number of tables = X + Y = 40.....(1)   Total capacity = 4X + 6Y = 220.......(2)   (2) - 4*(1) --&gt; 2Y = 60 --&gt; Y = 30, X = 10   How many more new tables than original tables does the restaurant have? --&gt; Y - X = 30 - 10= 
<gadget id="calculator">30 - 10</gadget>
<output>20</output>
20   Answer: 20
<result>B</result>
A local restaurant recently renovated its dining space, purchasing new tables and chairs to use in addition to the original tables and chairs. The new tables each seat six customers, while the original tables each seat four customers. Altogether, the restaurant now has 40 tables and is capable of seating 220 customers. How many more new tables than original tables does the restaurant have?