Answer:
[tex]Y+y=6[/tex]
Step-by-step explanation:
Given:
[tex]Y +3 = -y+9[/tex]
Taking the terms of 'y' to one side and the constant terms to other side.
[tex]Y +y=9-3[/tex]
As on changing the side the sign changes to opposite.
[tex]Y+y=6[/tex]
Also the 'y' and 'Y' are two variables that may have different values assign
So, the simplified expression is:
[tex]Y+y=6[/tex]