Question

Solve the following equations

$3(m+7)=42$

Answer 1

Solving the equation

The given equation is $3(m+7)=42$

$$\begin{gathered} \Rightarrow 3m+3\left(7\right)=42 \\ \Rightarrow 3m+21=42 \end{gathered}$$

Subtracting 21 from both the sides

$$\begin{gathered} \Rightarrow 3m+21-21=42-21 \\ \Rightarrow 3m=21 \end{gathered}$$

Dividing both the sides by 3

$$\begin{gathered} \Rightarrow \frac{3m}{3}=\frac{21}{3} \\ \Rightarrow m=7 \end{gathered}$$

Hence, the solution of the equation is $m=7$