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Sagot :
The equation is (0.75)9 + c = 20.
Linear system
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.
Simplification
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.
To find
The equation.
How to find the equation?
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.
https://brainly.com/question/20379472
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