1. Lesson 3.8 Rewrite Equations and Formulas
Essential Question: How do you rewrite equations?

2. Before we start…
Which one is a formula?

3. Literal Equations and Formulas
You can solve both literal equations and formulas.
You will use inverse operations to solve for the given variable.

4. What is a literal equation?
An equation with letters replacing coefficients and constants.

5. How do you solve a literal equation?
You will use inverse operations to isolate the given variable.
You treat it just like you are solving a regular linear equation.

10. What about an equation with two or more variables?
When an equation has two or more variables, it can be rewritten so that one variable is a function of the other variable(s).

11. Rewrite the equation so that y is a function of x.

12. Rewrite the equation so that y is a function of x.

13. Rewrite the equation so that y is a function of x.

17. Solve 12=9𝑥+3𝑦 for 𝑦
Solve 𝑙=24𝑓 for 𝑓

18. The penny size d of a nail is given by d = 4n – 2 where n is the length (in inches) of the nail.
Solve the formula for n.
Use the formula to find the lengths of nails with penny sizes: 5, 12, 16, and 20.

19. How do you rewrite equations?

20. Ticket Out the Door