Logic is the reasoning process where we use established principles to reach conclusions or solve problems. In mathematics, logic is applied to abstract concepts like numbers, functions, and shapes to arrive at accurate solutions. Logical reasoning is crucial in math, as it helps us to understand how different concepts are related and how we can use that knowledge to solve problems.

To better understand the role of logic in mathematics, let's take a closer look at a few examples:

**Example 1: Solving equations**

Equations are an essential part of mathematics and represent relationships between variables. When solving equations, we **use logical reasoning to isolate the variable and find its value.** For example, let's say we have the equation 2x + 5 = 11. To solve this equation, we would use the following steps:

**Step 1:** Isolate the variable term on one side of the equation.

We can do this by subtracting 5 from both sides of the equation:

2x + 5 - 5 = 11 - 5

Simplifying the left-hand side gives us the following:

2x = 6

**Step 2:** Solve for the variable by dividing both sides of the equation by the coefficient of the variable.

Dividing both sides of the equation by 2 gives us the following:

x = 3

In this example, we used logical reasoning to isolate the variable and find its value. By following established principles, we arrived at an accurate solution.

**Example 2: Using logical principles to understand numbers**

Logical principles are also used to help us understand how numbers work. For example, when we add two positive numbers, the sum is always greater than the original. Similarly, when we multiply two positive numbers, the product always exceeds the original numbers. This is an example of logical reasoning, as we use established principles to understand how numbers work.

Let's take a look at an example to illustrate this:

Suppose we have two positive numbers: 3 and 4. When we add these two numbers together, we know that the sum is 7, greater than the original numbers. We can also use logical reasoning to understand why this is the case. We know that 3 + 1 equals 4, so we can say that 3 + 4 equals 3 + (3 + 1), which simplifies to 6 + 1. Therefore, the sum of 3 and 4 equals 7, greater than the original numbers.

**Example 3: Using logical principles to understand geometric shapes**

Logical principles can also be applied to geometric shapes to help us understand their properties. For example, we know that the angles of a triangle always add up to 180 degrees. This is an example of logical reasoning, as we use established principles to understand the properties of triangles.

Let's take a look at an example to illustrate this:

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