document.write( "Question 529466: Eric needs to fill up his gas tank which holds 21 liters and is currently a third empty how many liters of gas will it take to fill the tank? \n" ); document.write( "
Algebra.Com's Answer #350198 by nahataba(3)\"\" \"About 
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if the gas tank is a third empty, you find two thirds of 21. one third of it is 7 because 21 divided by 3 is seven. two thirds would be 7 x 2=14. then you find the difference of 21 and 14 which is seven. so, he would need 7 more liters to fill the tank. \n" ); document.write( "
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