Solving Two Mstep Equations

What was done to solve the equation?

• add 8 to both sides, then divide both sides by 5

• add 8 to both sides, then divide both sides by 40

• subtract 8 from both sides, then divide both sides by 5

• subtract 8 from both sides, then multiply both sides by 5

15 = 2a + 7

• 2

• 4

• 12

• 14

Solve the equation shown

• 51

• 52

• 27

• 21

• -10

• 50

• -70

• 10

Mathematical Equivalence

ON

Mathematical Equivalence

ON

What is the first step you would do to solve the following equation?

2x - 14 = 34

• Add 14 to both sides

• Subtract 14 from both sides

• Divide both sides by 2

• Combine like terms

Solve the following two-step equation

2x - 14 = 34

• x = 10

• x = 48

• x = 40

• x = 24

To Solve a Simple Two-Step Equation you need to ...

• Undo the Addition/Subtraction first (to remove the constant term), then undo the Multiplication /Division (to remove the coefficient and isolate the variable)

• Undo the Multiplication/Division first (to remove the coefficient and isolate the variable), then undo the Addition/Subtraction (to remove the constant term)

• Multiply both sides by 1

• Substitue zero for the variable (to remove the variable and isolate the constant

What value for x makes the following equation true?

12x + 4x = 64

• x = 4

• x = 16

• x = 8

• x = -4