1. Lesson 3.2 Solving Equations with Multiplication and Division
Objective:
Students will be able to:
solve equations using multiplication and division.

2. To get the variable by itself, which number needs to be moved?
1) Solve. -5t = 60
To get the variable by itself, which number needs to be moved? -5
To move the -5, you have to do the opposite operation. What operation will we use?
division

3. 1) Solve t = 60
-5 -5
t = -12
-5(-12) = 60
Draw “the river” to separate the equation into 2 sides
Divide both sides by -5
Simplify
Check your answer

4. 2) Solve 15 = 6n 6 6 2.5 = n 15 = 6(2.5) Draw “the river”
6 6
2.5 = n
15 = 6(2.5)
Draw “the river”
Divide both sides by 6
Simplify
Check your answer

5. 3) Solve -3v = -129
v = -126
v = -43
v = 43
v = 126
Answer Now

6. 4) Solve You don’t like fractions? Let’s get rid of them! 
“Clear the fraction”
by multiplying both sides of the equation by the denominator.

7. 4) Solve 4 · · 4 x = -48 Draw “the river”
4 · · 4
x = -48
Draw “the river”
Clear the fraction – multiply both sides by 4
Simplify
Check your answer

8. 5) Solve = 18 · = 18 · x = 54 2 x = 27 Draw “the river”
· = 18 ·
x = 54 2
x = 27
Draw “the river”
Clear the fraction – multiply each side by the reciprocal
Simplify
Check your answer

9. 6) Which step clears the fraction in
Multiply by 3/5
Multiply by 5/3
Multiply by -12
Multiply by -5
Answer Now

10. 7) Solve
b = -56
b = -14
b = 14
b = 56
Answer Now

11. Solve:
/4 p = 2 ½
b = -39.1

12. Homework: p. 153 # evens