Combining like terms

Which expression is equivalent to
v + v + v + v + v?

• 5v
• v⁵
• v + 5
• v5

6x + 2x 

• 8x 
• 12x 
• 8 
• 12 

5z - 4z 

• 1z
• 9z 
• 20z 
• 0 

y + x + y + y + x 

• 2 + 3 
• x + y 
• 2x + 3y 
• 5xy 

Simplify by combining like terms:

3x + 2x + 3y - 7y

• 5x + 10y

• 5x + 4y

• 5x - 4y

• 5x -10y

5a + 2a + 2a 

• 9a
• 8a
• 7a

3b + b - 2b 

• 3b
• b
• 2b

Combine like terms
7n + 8p + n + p

• 8n + 9p
• 9p + 8n
• 7n + n + 8p +p
• 7nn + 8pp

Collect like terms: 
4y + 8d - 2y + 3d

• 11d + 6y
• 11d + 2y
• 6y + 5d

Simplify the expression: 
3t + 7y + t + 3y

• 3t + 10y
• 4t + 10y
• 4t + 4y