Expressions & Equations

Expressions & Equations

Quick Review

Parts of an Expression

Terms: the number of parts in an expression (2 in the example given)

The coefficient is the integer in front of the variable

The variable represents an unknown value

The constant is a number without a variable

Multiple Choice

What is the coefficient?

-9+ (-5x)

• -9

• -5

• x

Multiple Choice

How many terms are in the expression below:

3x - 6 + 4b + 5 + 7 -2x

• five

• six

• eight

• nine

Multiple Choice

What is the variable in this equation?

6+4y

• 6

• 4

• y

Equivalent Expressions

• Value of expressions stay equal to each other for any given value "x"

• Read the poster to the right!

Multiple Choice

Simplify

14(b-10)

• 14b-10

• b - 140

• 4b + 100

• 14b - 140

Solving Equations

The purpose of solving equations is to get the variable on it's own

We use inverse operations (opposite) to keep the equation true

Inverse Operations

Subtraction-Addition

Multiplication-Division

Multiple Choice

Simplify

2x + 5x - 4 + 1

• 2x +3

• 5x+5

• 7x+3

• 7x+5

Multiple Choice

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

-3=x+5

• subtract 5

• add 3

• add 5

• subtract 3

Multiple Choice

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

-6x=-24

• multiply by (-6)

• subtract (-6)

• add (-6)

• divide (-6)