Question

Solve each of the following equations by using inverse operations.

$9=\mathrm{d}+2$

Answer 1

$\Rightarrow 9=\mathrm{d}+2$

Adding $-2\mathrm{on}\mathrm{both}\mathrm{sides}$, we get

$$\begin{gathered} \Rightarrow 9+(-2)=\mathrm{d}+2+(-2) \\ \Rightarrow 9-2=\mathrm{d} \\ \Rightarrow 7=\mathrm{d} \end{gathered}$$

Hence, the solution is $\mathrm{d}=7.$