How to simplify an expression by applying distributive property and combining like terms

The video tutorial explains how to apply the distributive property to an algebraic expression and then simplify it by combining like terms. It demonstrates the process of rewriting expressions to maintain the correct signs and shows how to combine terms with the same variable factors to simplify the expression further.

Describe the process of simplifying the expression after applying the distributive property.

What is the result of combining 12X and 15X?