Question

How do I find the value of x in the attached file?

Answer 1

x (x + 1) = (x-2) ( x+5)
--> x = 10/2 = 5

Answer 2

Do you have any question?

Answer 3

Thank you very much, I understand it. :)

Answer 4

I suppose to write out the ratio, then apply the cross product method,
but my PC keeps jerking, so I go shortcut!