Algebra is the branch of mathematics that uses letters and symbols to represent numbers and quantities in equations and formulas. It is essential for solving problems in science, engineering, and many other fields.
What is an Equation?
An equation is a mathematical statement that asserts the equality of two expressions. For example, in the equation 2x + 3 = 7, "2x + 3" and "7" are two expressions, and the equals sign means that they have the same value.
Using Variables
Variables are symbols used to represent unknown values. In algebra, variables are usually represented by letters like x, y, and z. For example, in the equation 3x + 5 = 20, x is a variable.