One Step Equations Using Addition or Subtraction

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.
  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

Solve the equation:
20.5 = x + 4

• 16.5

• 16.05

• 24.5

• 24.05

y + 6 = 20

• y = 22

• y = 13

• y = 14

• y = 16

x - 10 = 12

• 22

• -22

• 2

• -2

In order to solve 6j - 9 = 27, I would first ​ (a)   , then ​ (b)   .

• add 9 to both sides

• subtract 9 from both sides

• divide by 9 on both sides

• divide both sides by 6

• subtract 6 from both sides

• add 6 to both sides

What is the first step to solve?

• subtract 6

• add 6

• subtract 4

• add 4

x - 62 = 123
Hint: What is the INVERSE of -62? Do this to BOTH sides!

• Add 62 to each side. 

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

• Add 5 to both sides

• Subtract 8 from both sides

• Subtract 5 from both sides

• Divide both sides by 5

To Solve the Equation Below, you would?

x - 62 = 123

• add 62 to each side

• multiply each side by 62

• subtract 62 from each side

• Add 123 to each side

What would be the best first step to solving the equation?

15 = m - 5

• add 15 to both sides

• add 5 to both sides

• subtract 15 from both sides

• subtract 5 from both sides