# The Complete Guide to Solving Inequalities and Compound Inequality Problems Using Our Math Calculator

## Introduction: The Basics of Solving Equations with a Calculator

A calculator is a device that performs arithmetic operations, such as addition, subtraction, multiplication, division and square root extraction.

The calculator was invented in the 17th century by Blaise Pascal. It was originally called the Pascaline.

A modern day calculator is a small hand-held device that has buttons to input numbers and perform calculations. The first calculators were developed in the 19th century and were used to solve mathematical problems.

## How to Solve Inequalities with 3 Easy Steps

The first step is to identify the inequality. The second step is to set up a solution. The third step is to check the solution by substitution.

## What is a Compound Inequality?

Compound inequalities are simply two inequalities that are combined together.

A compound inequality is a mathematical statement that has two inequalities connected with an “or” or “and.” The first inequality is called the “main” inequality and the second inequality is called the “auxiliary.” The main inequality states what we want to happen, and the auxiliary says when it will happen.

The main idea of a compound inequality is that both conditions have to be true for it to be true. If one condition doesn’t work, then it won’t work no matter what the other condition says.

## Conclusion and Final Thoughts

It is now time to solve the equation. We will use a calculator to do this.

Step 1: Press the “CAL” button on your calculator, and then enter the first number in the equation, which was 2 for this problem. Press “ENTER” on your calculator to input it.

Step 2: Enter the second number in the equation, which was 5 for this problem. Press “ENTER” on your calculator to input it.

Step 3: Enter the third number in this problem which is 8 and press “ENTER” on your calculator to input it.

Step 4: The answer will show up automatically on your screen when you press “ENTER” after entering all three numbers of an equation into a calculator!