Answer
x=6, y=21/2
Explanation
The 86 degrees is just to make you confused.
Since this is a congruent triangle, you can just follow these steps.
Line AB: To get from 4 to 6, you multiply by 1.5.
Line BC: Divide 9 by 1.5 to get x. 9 divided by 1.5 is 6.
Line AC: Multiply 7 by 1.5 to get y. 7 times 1.5 is 10.5.
So the correct answer is the first choice; x=6, y=21/2 (this is also 10.5).
