y represents the total amount Scott spent.
The question tells us the tote bag costed Scott 4 dollars; this is represented by 4 in the equation.
That leaves the 2x. The question tells us each book cost 2 dollars. The amount of money Scott spends on books depends on how many books he buys; this number is represented by x in this equation.
Answer:
The amount of books Scott bought.
Start with the standard form of a circle, where 
is the center of the circle and 
is the radius.
Plug in the known values.
This is the circle's equation in standard form.
Just equate both to each other and you get:
<span>x + 1 = y = 4x + 5
Leave out the y, and you get
</span>x + 1 = 4x + 5
That was I believe your first option.
You can now work out x:
-3x = 4 => x = -4/3
