For example, in the expression 3x + 2, 3 is the coefficient of x. The coefficient can be a positive or negative number, or even a fraction.

Algebraic expressions can also involve operations such as addition, subtraction, multiplication, and division. These operations are represented by symbols like +, -, *, and /.

Variables in algebraic expressions can be combined using these operations to create more complex expressions. For example, the expression 2x + 3y - 4z represents a combination of three variables, x, y, and z, with different coefficients and operations.

Algebraic expressions can also include exponents, which represent repeated multiplication. For example, in the expression 2x^2, the exponent 2 indicates that x is multiplied by itself twice.

Overall, algebraic expressions are a way to represent mathematical relationships and solve problems without assigning specific values to the variables. They allow for general solutions and can be manipulated using algebraic rules and properties.