simplifying expressions

4a + 9 + a

• 5a + 9
• 14a
• 3a + 9
• 5a - 9

What is the simplified form of this expression
3x+4+5x+3

• 15x
• 8x+7
• 7x+8

Simplify:
5x - 6x - 8x + 7 

• -9x + 7
• 10x + 7
• 9x + 7 
• 9x - 7

Simplify    5(2 - 7n) =

•  52 - 57n
• 10 - 7n
• 10 - 35n
• 10 + 35n

Simplify the expression: 7+3(1 - 2x) 

• 21 - 6x
• 10 - 2x
• 10 - 20x
• 10 - 6x

3(5 + 3x) - 4x

• -x + 8

• 7x + 15

• 5x + 15

• 7x + 8

6x + 3(-2 - x) - 4

• 9x - 10

• 3x + 2

• 3x - 10

• 9x + 10

Simplify the expression:
6 + 2(7x - 3) 

• 12 + 7x
• 14x
• 14x + 3
• 9 + 7x

3(2x+1)+2(x-4)

• 8x-3
• 8x+11
• 4x-5
• 8x-5

2(c - 8)

• 2c - 16
• 2c + 16
• 2c - 8
• c - 16