We are given the following expression
[tex]3y+2+7y+5[/tex]Group the like terms together
[tex]3y+2+7y+5=\mleft(3y+7y\mright)+\mleft(2+5\mright)[/tex]Perform the addition
[tex](3y+7y)+(2+5)=10y+7[/tex]Therefore, the simplified expression is
[tex]10y+7_{}[/tex]