One-Step Equations and Expressions

Choose the variable in this equation: x - 5 = 12

• x

• subtract

• 5

• 12

Evaluate the following equation: y - 18 = 72

• y = 9

• y = 90

• y = 54

• + 18

The goal when solving an algebraic equation is to isolate the variable.

• True

• False

The inverse operation of addition is multiplication.

• True

• False

The inverse operation of subtraction is addition.

• True

• False

The inverse operation for an equation that includes + 18 is:

• subtract 8

• subtract 18

• add 8

• add 18

Find the value of c in this equation: c - 8 = 42

• 34

• 8

• 42

• 50

If c = 4 and e = 9, evaluate: 2c + e

• 2

• 17

• 4

• 9

If m = 2 and r = 14, evaluate: 1m +14

• 1

• 14

• 16

• 15

What are the two basic rules for solving algebraic 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 opposite operation