5x -- 4= 9x +8
Combine like terms
Subtract 5x from both sides.
--4=4x+8
Subtract 8 from both sides.
I think the "--4" would be "+4" So, I will go on like that. If I did it wrong please tell me.
-4=4x
Divide both sides by 4.
-1=x
That is a really good answer Mellie :))