Solve a two step equation

The video tutorial addresses a common mistake students make when solving equations involving negative numbers. It explains how to correctly interpret and manipulate the signs in an equation, emphasizing the importance of understanding the operations involved. The tutorial uses a specific example to demonstrate the commutative property of addition and guides students through the process of solving the equation step-by-step, ultimately arriving at the correct solution.

What is the first step in solving the equation -18 + a/5 = 2?

• Multiply both sides by 5

• Subtract 18 from both sides

• Add 18 to both sides

• Divide both sides by 5

How can the expression a/5 + (-18) be rewritten using the commutative property?

• a/5 + 18

• 18 - a/5

• a/5 - 18

• -18 + a/5

What is the result of adding 18 to both sides of the equation a/5 - 18 = 2?

• a/5 = 36

• a/5 = -16

• a/5 = 20

• a/5 = 0

After isolating a/5 = 20, what is the next step to find the value of 'a'?

• Divide both sides by 5

• Multiply both sides by 5

• Add 5 to both sides

• Subtract 5 from both sides

Why is it important to focus on the sign in front of numbers when solving equations?

• It determines the operation to apply to the variable

• It changes the variable's value

• It helps in identifying the variable

• It simplifies the equation