Unit III Test Review (Alg)

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

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 x in the following equation:

20.5 = x + 4

• 16.5

• 16.05

• 24.5

• 24.05

Solve for z in the following equation:

z - 33 = 147

• z = 114

• z = 177

• z = 180

• no solution

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

• addition

• subtraction

• multiplication

• division

The inverse operation of subtraction is ??????????

• addition

• subtraction

• multiplication

• division

The inverse operation of multiplication is ??????????

• addition

• subtraction

• multiplication

• division

The inverse operation of division is ??????????

• addition

• subtraction

• multiplication

• division

SOLVE 10=z+6

8y = 48