Solving Unknown Variable Equations

Which equation does not have 6 as a solution?

• r + 5 = 11

• 3 - r = -3  

• 7r = 42

• r/3 = 18

To solve an equation, the goal is to __________ the variable on one side.

• Evaluate

• Leviate

• Isolate

• Reciprocate

A letter or symbol that represents an unknown value is called ______________.

• Variable

• Radicand

• Coefficient

• Constant

When you add a number to each side of an equation, you are using the ___________.

• Addition Property of Equality

• Subtraction Property of Equality

• Multiplication Property of Equality

• Division Property of Equality

When you use the reciprocal of a fractional coefficient to each side of an equation, you use the ___________.

• Addition Property of Equality

• Subtraction Property of Equality

• Multiplication Property of Equality

• Division Property of Equality

What are inverse operations?

• Absolute values

• Opposite operations used in isolating a variable

• Operations used for only inequalities

• Unknown quantity represented by a letter or symbol

A value that when substituted for the variable will make an equation true is a ____________.

• Term

• Constant

• Evaluation

• Solution

What is the number multiplied to a variable called?

• Constant

• Coefficient

• Variable

• Solution

Which definition best fits an equation?

• Mathematical statement containing one or more variables

• Mathematical statement containing numbers and operations

• Mathematical statement containing an equal sign ( = ).

• What's an equation?

Solve:
x – 8 = –5 

• 13

• –13

• 3

• –3