Answer: y = 3.1
Step-by-step explanation: We want to isolate the y.
First, we want to get rid of the -8 so we add 8 (this makes zero) What we do to one side we must do to the other so we add 8 to the 19.9 which gets us 27.9.
Our equation is now 27.9 = 9y. We still want to isolate the y. The 9y means 9 times y so to get rid of the 9 on that side we have to divide both sides by 9. Leaving us with y = 3.1