Seudónimo Seudónimo
  • 23-02-2015
  • Mathematics
contestada

Manuel's gas tank is
2/9
full. After he buys
12
gallons of gas, it is
2/3
full. How many gallons can Manuel's tank hold?

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 23-02-2015
x represents the full tank
so 2/9x+12=2/3x
solve for x
2/9x+12=2/3x
try to convert 2/3 to a commom denomenator (bottom numer )
2/3=6/9
2/9x+12=6/9x
subtract 2/9x from both sides
12=4/9x
mulitply both sides by 9 to get rid of fraciton
108=4x
divide by 4
27=x

it can hold 27 gallons
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