Make sure you are confident in calculating with negative numbers, which is a skill often needed to solve equations. To solve the equation, do the inverse operation. The inverse of multiplying by 12 is ...
What if we have an equation such as \({p}\) + 3 = 11? This time, in order to get \({p}\) on its own we would need to subtract 3 from both sides of the equation. This would leave us with \({p}\) = 8.