As 15 more people can go on with 2/3 of x already on, to make the value of x, this can be written as an expression like so:
\(\frac{2}{3}x + 15 = x\)
You can rearrange the equation like so to get the final answer:
\(15 = x - \frac{2}{3}x\)
\(15 = \frac{1}{3}x\)
\(15 * 3 = x\)
\(x = 45\)
Hope this helps :)
