Question

find a number which when added to its half gives 45

Answer 1

Let the no. be x

Now,
$x + \frac{x}{2} = 45 \\ \frac{2x + x}{2} = 45 \\ \frac{3x}{2} = 45 \\ x = 45 \times \frac{2}{3} \\ x = 30$
Hence, The no. is 30

Answer 2

Hey!
Let the number be x.
$x + \frac{x}{2} = 45$
$\frac{2x + x}{2} = 45$
$3x = 90$
$x = 30$
Therefore, the number is 30...
Hope it helps you!!