Equations Review

x + 12 = 20

• x = 32
• x = -32
• x = 8
• x = -8

Solve the equation
3x = 27. 

• x = 24
• x = 81
• x = 9

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides
• Subtract 11 from both sides
• Add 11 to both sides
• Divide 3 on both sides.

Solve: 3n + 4 = 7

• n = 1

• n = -1

• n = 3.67

• n = 2

Solve: 4c - 6 = 2

• c = 2

• c = -2

• c = 1

• c = 3

2x - 3 + 4x = 27

• 12
• 4
• 5
• 15

2x + 3(5x - 7) = 47

• x = 1
• x = 2
• x = 3
• x = 4

2x + 1 = 2(x -10)

• No Solution

• x = 0

• all real numbers (infinite)

6 + 9r = 9r + 6

• One Solution

• No Solution

• Infinite Solutions

Which represents infinite solutions?

• • - 15 = - 15

• 15 = - 15

• x = 15

• • - (-15) = - 15