Hello.
Plug in the value of p:
[tex]\mathrm{-10=10-3y}[/tex]
Now, all we have to do is solve the equation for y.
First, let's add 10 to both sides:
[tex]\mathrm{-10+10=10+10-3y}[/tex]
[tex]\mathrm{0=20-3y}[/tex]
Now, add 3y to both sides:
[tex]\mathrm{3y=20}[/tex]
Divide both sides by 3:
[tex]\Large\boxed{y=\frac{20}{3} }[/tex]
I hope it helps.
Have a nice day.
[tex]\boxed{imperturbability}[/tex]