I don't know how to "slove", and yes, it is essential that you proofread your post BEFORE you submit.
If two secants of a circle intersect in a point exterior to the circle, the measure of the entire first secant multiplied by the measure of the portion of that secant exterior to the circle is equal to the measure of the entire second secant multiplied by the measure of the portion of the second secant that is exterior to the circle. Hence:
You can do you your own arithmetic.
John
My calculator said it, I believe it, that settles it
