y=4.4
This is a very simple one-step problem. All you need to do is subtract 8.3 from both sides of the equation to cancel out the 8.3 on the left side. This leaves you with y+0=4.4, because 8.3-8.3 is 0, and 12.7-8.3 is 4.4. Now, you can remove the +0, as that doesn’t affect the answer. This leaves you with just y=4.4.