Answer:
4
Step-by-step explanation:
Subtraction.
There are seven days in a week. Subtract, (take away) the amount of days Ty bought gasoline, and you now have the answer.
He did not buy gasoline on four days of the week.
- Hope this helps, good luck.
12-2t
boi
x=3
x-4 =y
-x+2=y
x-4 = -x+2
2x = 6
x = 3
:D