Answer:
The value of y is;
[tex]y=-2[/tex]Explanation:
Given the equation;
[tex]y+3y+5y=-18[/tex]Solving the equation, let us add the like terms;
[tex]\begin{gathered} y+3y+5y=-18 \\ 9y=-18 \end{gathered}[/tex]divide both sides by 9;
[tex]\begin{gathered} \frac{9y}{9}=\frac{-18}{9} \\ y=-2 \end{gathered}[/tex]Therefore, the value of y is;
[tex]y=-2[/tex]
