Answer:
I have found unreliable people would leave message and fail to answer properly and not always report but then found their answer was deleted later- but sometimes its straight away as repeat offenders often have all of their answers deleted at once
ANSWER

EXPLANATION
Since the altitude, |GJ| bisects the base of the triangle, it follows that, the triangle is an isosceles triangle.
This implies that,.

In terms of x, we have the equation.

We now group like terms to obtain,

This implies that,

Let us divide through by 2 to get,

We can see from the diagram that,

We substitute x=5 to get,

This simplifies to,
