1. Bell Quiz

2. Objectives
Solve for one variable in equations with multiple variables.

3. Solving Literal Equations
Recall when solving an equation with one variable:
Inverse operations are used to isolate the variable as shown below.

4. Solving Literal Equations
A Literal Equation is an equation with more than one variable.
As in an equation with one variable,
Use inverse operations and properties of equalities to solve for a specific variable in a literal equation.
The solution for the specific variable will be in the terms of the other variables and numbers.

5. Example 1 Solving for a Variable
Solve for y. 2x + 3y = 10

6. Lesson Practice
Solve for n. 3m + 2n = 8

7. Solving Literal Equations
If the variable being solved for is on both sides of the equation, the first step is to:
Eliminate the variable on one side or the other.

8. Example 2 Solving with Variables on Both Sides
Solve 8x + 20 = x

9. Example 3 Solving for Variables on Both Sides
Solve for p 4p + 2a – 5 = 6a + p

10. Lesson Practice
Solve for x 3x + 2y = 8 + x

11. Solving Literal Equations
A formula is a type of literal equation.
Use inverse operations to isolate any variable in the formula.

12. Example 4 Solving a Formula for a Variable
C = 5
(F – 32) 9

13. Example 5 Application: Geometry

14. Lesson Practice
The Ramirez family is taking a trip to the coast. They live 270 miles from the coast. They want to make the trip in 4 ½ hours. Use the distance formula d = rt to determine the average speed the family needs to drive.

15. Lesson Practice .

17. Lesson Practice