The equation is (0.75)9 + c = 20.
<h2>Linear system</h2>
It is a system of an equation in which the highest power of the variable is always 1. A one-dimension figure that has no width. It is a combination of infinite points side by side.
<h3>Simplification</h3>
Simplification is to make something easier to do or understand and to make something less complicated.
Given
Jimmy is selling used books at a yard sale.
A customer buys 9 books at a cost of $0.75 each and pays with a $20.00 bill.
<h3>To find </h3>
The equation.
<h3>How to find the equation?</h3>
A customer buys 9 books at a cost of $0.75 each and pays with a $20.00 bill.
Let c be the profit.
Profit = Selling price - cost price
c = 20 - (0.75)9
On simplifying, we get
(0.75)9 + c = 20
So the equation is (0.75)9 + c = 20.
More about the linear system link is given below.
brainly.com/question/20379472
