Distributive property means that you must multiply the number directly outside the parentheses to all the numbers inside the parentheses
Look at the image below for the work!
Hope this helped!
Answer:
Just leave it and tell your teacher about it, Desmos did that to me before as well and she told me just to leave it
7) -5-x=0
x=-5
8) 4x-36=0
4(x-9)=0
x-9=0
x=9