Combining Like terms

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

How many terms does this expression have?
-18y + 7yz - 4z

• -18
• 3
• 7
• -4

Simplify: x + 3x + 6x + x

• 9x

• 11x

• 2x + 9x

• Can't be simplified

Simplify: 7t - 3t + t - 3t

• 2t

• 8t - 6t

• 14t

• Can't be simplified

Simplify: m + m + m + m

• 4m

• m⁴

• m

• Can't be simplified

A variable can be _______?

• Any number

• Any letter of the alphabet

• only X

• only 1

Simplify by combining like terms.
m + 9 - 4m

• 5m
• m + 5m
• -3m + 9
• 4m

Simplify: 6x + 12x + 3 y

• 21x

• 18x + 3y

• 72x + 3y

• 6x + 15y

y + x + y + y + x 

• 2 + 3 
• x + y 
• 2x + 3y 
• 5xy 

3 + 5x + 4

• 5x ∙ 7 
• 12x 
• 35x 
• 5x + 7