Question

Solve each of the following equations by using inverse operations.

$\mathrm{a}+7=12$

Answer 1

$\Rightarrow$$\mathrm{a}+7=12$

Adding $-7$ both sides

$$\begin{gathered} \Rightarrow \mathrm{a}+7+(-7)=12+(-7) \\ \Rightarrow a+7-7=12-7 \\ \Rightarrow a=5 \end{gathered}$$

Hence, the solution is $\mathrm{a}=5$