Save guides, add subjects and pick up where you left off with your BBC account. Make sure you are confident in calculating with negative numbers, which is a skill often needed to solve equations. To ...

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.