Equations

x + 9 = 21

4x + 7 = 23

 2x - 3 = 1 

• Add 3 to both sides

• Subtract 11 from both sides

• Add 11 to both sides

• Divide 3 on both sides.

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 the equation
3x = 27. 

• x = 24

• x = 81

• x = 9