Math Example: Solving Two-Step Equations: Example 23

Topic

Solving Equations

Description

This math example demonstrates solving the equation 5x - (-7) = 18. The solution involves adding -7 to both sides and then dividing by 5 to isolate the variable x. The final result is x = 2 1/5 or 2.2. This example showcases how to handle negative numbers and fractions in two-step equations.

The collection of examples in this set is designed to teach the topic of solving two-step equations by presenting a variety of equation types. These examples cover different combinations of operations, including addition, subtraction, multiplication, and division, as well as equations involving negative numbers and fractions. By working through these diverse problems, students can develop a comprehensive understanding of the steps required to solve two-step equations and learn to apply these skills to various scenarios.

Exposure to multiple worked-out examples is crucial for students to fully grasp the concept of solving two-step equations. Each example reinforces the problem-solving process while introducing slight variations, allowing students to recognize patterns and develop effective problem-solving strategies. This approach helps build confidence and flexibility in tackling different types of equations, preparing students for more complex mathematical challenges.

Teacher Script: "Let's look at this equation: 5x - (-7) = 18. What do you notice about the left side of the equation? That's right, we have a minus sign followed by a negative number in parentheses. This is equivalent to adding 7. So, our first step is to add 7 to both sides. Then, we'll divide both sides by 5 to isolate our variable. Can you work through the steps and tell me what our final answer will be? Remember, we might end up with a fraction or a decimal, so be prepared to express your answer in both forms."

For a complete collection of math examples related to Solving Two-Step Equations click on this link: Math Examples: Two-Step Equations Collection.