Problem 32 - Elementary Algebra

Question

Solve each of the conditional equations. $$ k+10=1 $$

Step-by-Step Solution

Answer

Answer: $$k = -9$$

Step 1: Identify the equation to solve

We are given the equation $$k + 10 = 1$$.

Step 2: Isolate the variable k

To solve for k, we must subtract 10 from both sides of the equation: $$k + 10 - 10 = 1 - 10$$

Step 3: Solve for k

Now, we simplify the equation: $$k = -9$$ Therefore, the solution to the conditional equation is $$k = -9$$.

Key Concepts

Conditional Equations

In mathematics, a conditional equation is an equation that is true only for certain values of the variable or variables. These equations are like a puzzle. By solving them, you find the specific value or set of values that makes the equation true. For example, the equation \( k + 10 = 1 \) is conditional because it only holds true when \( k \) is equal to \(-9\). If \( k \) is any other value, the equation won't balance, and it won't be true. This particular feature of conditional equations makes solving them an exciting challenge, as you're tasked with finding the one solution that works. It’s important to note that not all equations are conditional—some have infinite solutions or no solution at all. However, with conditional equations, there's a specific solution to find.

Algebraic Manipulation

Algebraic manipulation involves rearranging and simplifying equations to find the values of unknown variables. This can include operations such as addition, subtraction, multiplication, and division on both sides of an equation to isolate a variable. Let's take the equation \( k + 10 = 1 \). Here, algebraic manipulation starts with subtracting 10 from both sides, which helps to simplify the equation. Each step of manipulation should maintain the equality of the equation's two sides. For instance, when we subtract 10 from both sides, the equation becomes \( k = 1 - 10 \). This step-by-step manipulation is crucial in solving equations because it leads to a simpler form where the solution can be seen clearly. Using algebraic manipulation correctly ensures the integrity of the original equation while unraveling the values of its variables.

Isolation of Variables

The isolation of variables is a fundamental technique used in solving equations. It refers to the process of getting the variable you are solving for on one side of the equation, all by itself. This is done by applying inverse operations systematically to both sides of the equation. In our example, we started with \( k + 10 = 1 \). To isolate \( k \), we need to remove the constant 10 added to it. This is accomplished by deducting 10 from both sides, leaving \( k \) alone on the left: \( k = -9 \). This technique is essential because once the variable is isolated, you've essentially solved the equation. By effectively isolating the variable, you not only find the solution but also gain deeper insight into the relationship represented by the equation. It's like peeling away layers of an onion to reveal the core—the solution.