Simplifying Expressions by Combining Like Terms

The video tutorial explains how to simplify a mathematical expression with six terms. It begins by identifying and combining like terms that contain the variable X, resulting in 9x. Next, it combines the constant terms, adding 4 and 5 to get 9, and then subtracting 2 to arrive at 7. The final simplified expression is 9x + 7, as 9x and 7 are not like terms and cannot be combined further.

How many terms are initially present in the expression?

• Three

• Five

• Six

• Four

What is the result of combining 1x, 3x, and 5x?

• 6x

• 7x

• 8x

• 9x

What is the sum of the constants 4 and 5 before any subtraction?

• 9

• 10

• 7

• 8

What is the final simplified form of the expression?

• 9x + 7

• 9x + 9

• 9x - 7

• 7x + 9

Can 9x and 7 be combined into a single term?

• No, because they are not like terms

• Yes, but only in certain conditions

• Yes, they can be combined

• No, because they represent different variables