Question

When 36 is subtracted from the square of a number three result is 5 times the number. what is the positive solution?

Answer 1

$x^{2} -36=5x$
$x^{2} -5x-36=0$
This is a quadratic equation
Skipping ahead, you'll get that x = 9 or -4
Since the positive solution is needed the answer is 9