Equations Intro

What is the difference between an equation and an expression?

• An equation has an =

• An expression has an =

• An expression is a statement of equality

• An equation is a statement of comparison

2 and three times a number

• 3+2x

• 3+3x

• 2+3x

• 2+2x

the difference of 5 and half of a number

• 5-x/2

• 1/2+5

• 5-1/2

• 5+x/2

4 and three times a number

• 4+3x

• 4-3x

• 3-4x

• 3+4x

Which of the following is an expression?

• 4+5x

• 2=2

• 1-3=2

• 4x=5

Which of the following are like terms

• 3x and 4

• 4 and 4x

• 2x and 3y

• 3x and 4x

Which is true when x=9

• 10=11-x

• 11-x=2

• 2x=27

• 3x=4

Which is true when x= -2

• x-3=5

• x-3=-5

• x+6=8

• 2x=4

Which is true when a=10

• -4a=14

• -4a=-40

• 4a=14

• 4a=-40

which is true when  $x=-2$  

• $\frac{x}{2}=1$

• $\frac{x}{2}=-1$

• $\frac{x}{2}=2$

• $\frac{x}{2}=-2$