It’s A buddy! i just did this one for another student also
You will have to get the -3x by itself so you will add 6 to both sides so -3x-6+6-5+6 and you will get -3x=11do you need anymore help?
Let, the amount of sales = x
Then, commission from sale will be: x * 0.02
So, Equation would be: 500 + 0.02x
Hope this helps!