Answer:
6.00 gal
Explanation:
Let x be the number of gallons of gas
".10$ off per gallon of gas at 3.43$ per gallon" can be written as:
($3.43/gal - $0.10/gal)
"with 20.0$ to spend" can be written as = $20
The total cost of the gas is
($3.43/gal - $0.10/gal)*x
The maximum number of gallons that can be purchased with $20 when gas is $0.10 off per gallon is:
($3.43/gal - $0.10/gal)*x = $20
($3.33/gal)*x = $20
x = ($20)/ ($3.33/gal)
x = 6.00 gal