When you subtract variables, you follow the same overall pattern as when you subtract numbers. This video explains the process with details and examples.

Algebra

Variable

Coefficient

Algebraic Expression

Combining like Terms

Subtracting Variables

Adding and Subtracting Unlike Terms

Multiplying Numbers by Coefficients

Combining Variables with Exponents

Replacing a Variable with a Number

Elementary Algebra

A symbol, often a letter from the alphabet, which represents an unknown value.

The number in front of a variable or product of variables, showing how many you have of that variable or product of variables.

Two or more terms together form an expression.

Length

Length