Two Step Equations Review

To solve a two-step equation, first you undo any​ (a)   or ​ (b)   . Then you undo any ​ (c)   or ​ (d)   .

• addition
• subtraction
• multiplication
• division

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides
• Subtract 11 from both sides
• Add 11 to both sides
• Divide 3 on both sides.

4x + 7 = 23

• x = 16
• x = 4
• x = 9
• x = 12

Level 3

Solve for x

• x = 2

• x = -2

• x = -10

• x = 4

Level 3

Identify the steps to solve for b

• Add 6 to both sides and divide both sides by 5

• Add 6 to both sides and multiply both sides by 5

• Subtract 6 from both sides then multiply both sides by 5

• Subtract 6 from both sides then divide both sides by 5

x - 62 = 123

How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side.

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

The objective when solving an equation is to....

• isolate the variable.
• check the solution.
• guess and check.
• hope you get the right answer.

Identify the steps to solve for b

• Add 6 to both sides and divide both sides by 5

• Add 6 to both sides and multiply both sides by 5

• Subtract 6 from both sides then multiply both sides by 5

• Subtract 6 from both sides then divide both sides by 5

Solve:

-6 - 10x = 84

• x = -9

• x = 9

• x = -8

• x = 8

Solve.  x/4 + 11 = 20

• 9
• 36
• 9/4
• 31/4