One Step/Combining Like Terms

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

• 5m
• m + 5m
• -3m + 9
• 4m

3x-5x

• 2x
• 8x
• -2x
• 15x²

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

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

Simplify: 15x + 19 + 2x - 4

• 17x + 15

• 17x + 23

• 30x + 15

• 13x + 15

x + 8 = 15

• 7

• 8

• 9

• 6

n - 4 = 12

• 12

• 10

• 8

• 16

• x = 20
• x = 7
• x = 10
• x = 3

5.    6b = 30

• x = 36
• x = 24
• x = 180
• x = 5

4 + b = 30

• -34
• 34
• -26
• 26

What would be the best first step to solving the equation in one step?

• multiply both sides by 3
• multiply both sides by -3
• divide both sides by -3
• add 3 to each side