Answer:
5x + 7y + 9z
Explanation:
Like terms are terms that have the same exponent and variable. In this expression, everything has the same exponent, so only variables matter.
Combing x-values
When combing a lot of like terms, we can do it one variable at a time. So take all of the terms that have x in them, 2x and 3x, and add them together.
Combing y-values
Now, we can take the terms that have a y-variable. This means 3y and 4y.
Combing z-values
Finally, to fully simplify the expression we can take the final terms, 4z and 5z.
Final Expression
Once all of the like terms are combined we can rewrite the expression with the values we have created. The final answer is 5x + 7y + 9z.