document.write( "Question 629684: David's gas tank is 1/6 full. After he buys 7 gallons of gas, it is 1/2 full. How many gallons can David's tank hold? \n" ); document.write( "
Algebra.Com's Answer #396425 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi,
\n" ); document.write( "David's gas tank is 1/6 full.
\n" ); document.write( "After he buys 7 gallons of gas, it is 1/2 full\"1%2F6+%2B+2%2F6+=+1%2F2\". 2/6 = 1/3 of Tank is 7 gal
\n" ); document.write( "Gas Tank is a 21 gal tank \n" ); document.write( "
\n" );