Question

Three times a number increased by thirty-six equals fifty-seven. What is the number ?

Answer 1

Find the required number

Let the number be $x$

From the given condition,

$3x+36=57$

Subtracting $36$ from both the sides, we get

$$\begin{gathered} \Rightarrow 3x+36-36=57-36 \\ \Rightarrow 3x=21 \end{gathered}$$

Dividing both sides of equation by $1$, we get

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

Hence, the required number is $7$