Hey there!☺
[tex]Answer:\boxed{y=-3x+5}[/tex]
[tex]Explanation:[/tex]
Solve for y | [tex]9x+3y=15[/tex]
Let's start by adding -9x to both sides of the equation:
[tex]9x+3y+-9x=15+-9x\\3y=-9x+15[/tex]
Now in our second/last step, we will divide both sides by 3:
[tex]\frac{3y}{3}=\frac{-9x+15}{3}\\y=-3x+5[/tex]
y=-3x+5 is your answer.
Hope this helps!☺