1. 1.4 Rewrite Formulas and Equations

2. In this lesson you will:
Rewrite equations with more than one variable.
Rewrite common formulas.

3. Solving an equation with more than one variable.
Solve 7x –3y = 8 for y
-7x x Subtract –7x from each side
-3y = 8 – 7x
Divide each side by -3

4. Given the equation x +xy =1 Find the value of y when x = -1

5. Solve the equation for

6. y = -2

7. Solve the equation for the indicated variable:

8. Solve the equation for the indicated variable:

9. Solve the equation for the indicated variable:

10. Solve the equation for the indicated variable:

11. Common Formulas Take note of the formulas on page 26.
These will be used throughout the course and should be put in your notes.