Adding Variables

2x + 5x =

• -7x

• 7x

• 3x

• -3x

50y + 12y =

• -38y

• -62y

• 38y

• 62y

1x² + 3x² =

• 4x²

• 2x²

• You can't add these.

• 4x

(3y² + 2y) + (7y² + 6y) =

• 5y² + 7y

• 18y³

• 10y² + 8y

• 8y² + 10y

• the number of rope wristbands sold

• the number of beaded wristbands sold

• the selling price of one rope wristband

• the selling price of one beaded wristband

a symbol for an unknown value; usually a letter (such as a, x, or y) is the symbol used

• constant

• variable

• coefficient

• term

5h² - 3h² =

• 2h²

• 8h²

• -2h²

• -8h²

1 + 2 =

• 3

• -3

• 1

• -1

5x + 1 -3x + 2 =

• 2x + 3

• -2x + 8

• You can't combine any like terms.

• 8x + 3

Find n.

3 + n=6

• 3

• 2

• 1

• 7