Common Errors when Simplifying

Which expression is equivalent to

27 - 6x ?

• 6x - 27

• -6x + 27

Which expression is equivalent to

-2x + 6 ?

• -6 + 2x

• 6 - 2x

Which expression is equivalent to

1 - x ?

• x - 1

• -x + 1

Which is equivalent to

-4x - 15?

• -15 - 4x

• 15 + 4x

Which is equivalent to 3(x - 1)

• 3x - 1

• 3x - 3

Which is equivalent to

-3(2x - 7)

• -6x + 21

• -6x - 21

What is the correct first step

to simplifying

3 - 2(x + 5) ?

• 1(x + 5)

• 3 - 2x + 10

• 3 - 2x - 10

What is the first step

to simplifying

3 - (x - 5) ?

• 3 - x + 5

• 3 - x - 5

Which are true statements?

You may choose more than one answer.

• 2x + 5x = 7x

• x + x = x

• x + 3x = 4x

• x + x = 2x

True or False?

-(2 + x) = -1(2 + x)

• True

• False