Transcript Solving Multiplication and Division Equations

Solving Multiplication and
Division Equations
Lesson Objective
Students will be able to solve multiplication and
division equations.
Lesson Beginning
Draw algebra tiles to model 3x = -9. Then solve
for x.
1) GOAL: Get the variable on one side
of the equation.
2) You always perform the same operation to
both sides of an equation.
3) To undo an operation you perform its
opposite operation to both sides of the
equation.
The inverse operation of multiplication
is DIVISION.
The inverse operation of division is
MULTIPLICATION.
This reads 9 times x
So use the opposite.
Divide both sides by 9.
9x = 45
9
9
x =5
- 4m = - 28
-4
-4
m=7
(8)  k  6 (8)
8
Now
Divide
By -1
- k = 48
-1
-1
k = - 48
Solve for x.
Practice
1. −13𝑏 = 65
2.
𝑐
2
= 13
3. 16 = −𝑠
4.
𝑠
−4
=3
5. −2 =
2
𝑡
5
Homework
Pg 356 # 3-21 odds, 27, 31-41odds