Algebra is the language through which we describe patterns in mathematics. It involves usage of letters with numbers to depict problems.
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Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? Algebra is the language through which we describe patterns in mathematics. It involves usage of letters with numbers to depict problems. In this topic chapter we will learn about Matchstick patters, we will introduce the idea of variables, and we will understand where these variables can be used. A variable is depicted as a letter which can take any value. We will also learn to write linear expressions and ways to solve them.This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it.

Wait, why are we using letters in math? How can an 'x' represent a number? What number is it? This tutorial is great if you're just beginning to delve into the world of variables and expressions.

Expression like (4x + 5), which contains the variable x, cannot be evaluated. Only if x is given some value, an expression like (4x + 5) can be evaluated. In this topic we will learn how to evaluate exponential equations, we will write expressions variables and learn how to solve them when the value of the variable is specified.

The value of the variable in an equation which satisfies the equation is called a solution to the equation. Here we will learn to solve an equation using substitution.