One Step Equations Addition and Subtraction Rules

Solve for x in the following equation:

20.5 = x + 4

• 16.5

• 16.05

• 24.5

• 24.05

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 for z in the following equation:

z - 33 = 147

• z = 114

• z = 177

• z = 180

• no solution

SOLVE 10=z+6

Solve the equation.

x + 9 = -5

Mathematical Equivalence

OFF

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

q - 12 = 1

What equation matches this situation? Robyn had some video games then bought 4 more. Now she has a total of 10 games.

• v - 4 = 10

• v + 4 = 10

• 10 - 4 = v

• Answer not given

Select the following basic rules used for solving one step equations?

• Whatever you do to one side of the equal sign, you must copy and do on the other side of the equal sign

• Negative signs can be ignored

• Always start on the left side, regardless of where the variable is

• Always do the inverse operation

The inverse operation of addition is ??????????

• addition

• subtraction

• multiplication

• division