Help me

3y+20=3+2y 
3y-2y+20=3 (Make sure you subtract 2y from both sides to get rid of an order pair(When numbers has a positive/negative that makes the number to 0) 
y+20=3(Make sure you subtract 20 from both sides since is a positive number and to make y alone) 
y=-17 
Checking answer 
3y+20=3+2y 
3(-17)+20=3+2(-17) 
-51+20=3-34 
-31=-31 (Checked)

 

Easy peasyy!!