Solving Equations by 2 2 Multiplying or Dividing

Solving Equations by 2 -2 Multiplying or Dividing Objective Solve one-step equations in one variable by using multiplication or division. Holt Algebra 1

Solving Equations by 2 -2 Multiplying or Dividing Solving an equation that contains multiplication or division is similar to solving an equation that contains addition or subtraction. Use inverse operations to undo the operations on the variable. Inverse Operations Operation Multiplication Division Holt Algebra 1 Inverse Operation Division Multiplication

Solving Equations by 2 -2 Multiplying or Dividing Example 1 A: Solving Equations by Using Multiplication Solve the equation. j – 8 = 3 Since j is divided by 3, multiply both sides by 3 to undo the division. – 24 = j Holt Algebra 1

Solving Equations by 2 -2 Multiplying or Dividing Check It Out! Example 1 a Solve the equation. Check your answer. p = 10 5 Since p is divided by 5, multiply both sides by 5 to undo the division. p = 50 Holt Algebra 1

Solving Equations by 2 -2 Multiplying or Dividing Example 2 A: Solving Equations by Using Division Solve the equation. Check your answer. 9 y = 108 y = 12 Holt Algebra 1 Since y is multiplied by 9, divide both sides by 9 to undo the multiplication.

Solving Equations by 2 -2 Multiplying or Dividing Check It Out! Example 2 c Solve the equation. Check your answer. -4 k = -8 k=2 Holt Algebra 1 Since k is multiplied by -4, divide both sides by -4 to undo the multiplication.

Solving Equations by 2 -2 Multiplying or Dividing Check It Out! Example 3 c Solve the equation. 3 w=6 4 w=8 Holt Algebra 1

Solving Equations by 2 -2 Multiplying or Dividing Check it Out! Example 4 Monique has d DVDs. She is packing them up in 3 boxes to move. She ends up filling each box with 15 DVDs. Write an equation to describe the situation and then use it to find out how many total DVDs she has. Number of DVDs divided by 3 equals number of DVDs in each Write an equation to represent the relationship. Substitute 45 for d. 15 = h Monique has a total of 45 DVDs. Holt Algebra 1 box