Adding with Variables

Which equation represents the equation?
Charlie and Anthony together have 340 trading cards. If Charlie has 160 trading cards, how many does Anthony have?

• 160 + c = 340 

• c + 340 = 160

• 160 - c = 340

• c - 340 = 160

What is the first step to solve this equation?
x + 8 = 10

• Subtract 8 from x 

• Subtract 8 from both sides 

• Subtract 8 from one side and add 8 to the other 

• Add 8 to both sides

What is the error?

• Adding 2x to 3x

• Subtracting 5 from both sides

• Adding 2x to -2x

• Dividing by 5 on both sides

What is the first step you should take to solve this problem?

• subtract 8n to both sides

• multiply 6n to both sides

• combine the like terms 4n + -6n

• add 1 to both sides

An airline charges $(20x + 4) for a ticket and $(4x) for a seat upgrade, and $(2x + 1) for premium movies on a flight. Which expression represents the total price you would pay for a seat with an upgrade, and premium movies?

• $31x

• $24x + 4x + 3x

• $24x + 7

• $26x + 5

Combine like terms to simplify: (5x + 2) + (4x - 5)

• 9x -3

• -9x-7

• 9x+7

• x+7

Simplify the expression.
(4a³ - 8a - 4a²) + (7a³ - 7 - 6a)

• 11a³ - 4a² - 14a - 7 

• 5a³ - 4a² - 14a - 7 

• 5a³ - 4a² - 20a - 7 

• 5a³ - 9a² - 20a - 7

Find the sum.
(2x² + 5x - 7) + ( 3 - 4x² + 6x)

• 2x² + 3x +1

• -2x² - 11x -4

• 2x² + 5x -7

• -2x² + 11x -4

Add or Subtract to Simplify:

(4x²+ x) - (x² -2x)

• 3x² - x

• 4x² + 2x

• 3x² + 3x

• 3x² + 2x

One difference between adding and subtracting polynomials is...

• Using the associative property

• Using the distributive property

• Using the commutative property

• Nothing. The process is the same