1. Section 2.6 Solve Equations by Multiplying or Dividing
Algebra Concepts
Section 2.6
Solve Equations by Multiplying or Dividing

2. What operation does the expression 5v have?
Recall 5v means 5 times v.
To “undo” multiplication in an equation, do division.
Multiplication and division are inverse operations.

4. Solve the equation 4𝑥=20

5. T o check the solution-
Write the original problem x=20
Substitute the solution in (5) ? 20
Simplify =20

6. If the variable is divided by a number, multiply to “undo” the division.
Solve 𝑥 4 =9

7. Do the check for that problem
𝑥 4 =9
? 9
9=9

8. Solve for x and check!
#1 𝑥 −2 =10 #2 7= 𝑥 50 #3 𝑥 7 =−1 #4 𝑥 −8 =−4 #5 𝑥 6 =0

9. Mixing things up! Solve for the variable! #1 5𝑥=17 #2 𝑚 −4 =2
#1 5𝑥=17
#2 𝑚 −4 =2
#3 𝑔 10 =−9
#4 −3𝑥=9

10. Write an equation
The product of three and a number is twenty-seven.