Simplify the difference. (–7x – 5x^4 + 5) – (–7x^4 – 5 – 9x)

Step-by-step explanation:

You need to remember the mulplication of signs:

Knowing this, you can distributive the negative sign. Then you get:

Now you need to add the like terms. Then:

Finally, you can order the polynomial obtained in descending order. Therefore, the answer is:

thats not a system of equations, that is a solution