Answer:
$2.
Explanation:
What the question is asking you to do, is to make an algebraic expression. First, we will start with what she had, which was $32. Next, it says that "after 6 rides, she had $20 left." The words "left" or "left over" imply subtraction in an equation. So, now we will put together what we have.
32 - 6r.
To explain the r, in algebra letters called variables represent mystery numbers that you have to solve and figure out. Anytime that you see a variable next to a number, it means you need to multiply the mystery number by the base number, which is 6 in this situation. We will use the letter r in this situation for rides. Now we will fit the 20 into the equation. So, we will now solve and complete the equation.
32 - 6r = 20.
First, subtract 32 from both sides of the equation to cancel out the +32. Doing this will balance the equation.
32 - 6r = 20
-32 -32
-12
Because of the subtraction sign in front of the 6, it is now negative. We now also need to cancel out that -6 to find the answer of r.
- 6r = -12
-6 -6
And, a negative divided by a negative equals a positive, so:
r = 2.
I hope this helps.