Alright, lets get started.
Suppose the regular price of the gas is = x
On Tuesdays, gasoline service station offers 20 cents off the regular price per gallon.
Converting 20 cents into dollars, it will be 0.2 dollar
On Tuesdays the price of the gas per gallon will be = x - 0.2 dollars
For the price of gas per gallons on Tuesday , the equation will be : x - 0.2 (where x is the price of gas per gallon on regular days): Answer
Hope it will help :)
