Question

Three times the sum of half a number and 9 is 30

Answer 1

Answer:

The number is 2

Explanation:

Let x represent the number;

Three times the sum of half a number and 9 is 30 ​

it can be expressed mathematically as;

$3(\frac{x}{2}+9)=30$

Firstly, let us divide both sides by 3;

$\begin{gathered} \frac{3(\frac{x}{2}+9)}{3}=\frac{30}{3} \\ (\frac{x}{2}+9)=10 \end{gathered}$

Then subtract 9 from both sides;

$\begin{gathered} (\frac{x}{2}+9)=10 \\ \frac{x}{2}+9-9=10-9 \\ \frac{x}{2}=1 \\ x=2 \end{gathered}$

Therefore, the number is 2