If 4 gallons of gasoline are added to a tank that is already filled to 3/4 of its capacity, the tank is then filled to 9/10 of its capacity. How many gallons does the tank hold? Choices.
A) 20	B) 24	C) 36	D) 40	E) 60
Let the Capacity of the tank=C   (3/4)C + 4= (9/10)C   =&gt;(9/10)C - (3/4)C = 4   =&gt;(3/20)C = 4   =&gt;C = (4*20)/3 = 26.66   Number of gallons of gasoline that the tank currently holds = 3/4*C +4 = 19.99+4= 
<gadget id="calculator">19.99+4</gadget>
<output>23.99</output>
23.99=24   Answer 24
<result>B</result>
If 4 gallons of gasoline are added to a tank that is already filled to 3/4 of its capacity, the tank is then filled to 9/10 of its capacity. How many gallons does the tank hold?