Answer:
Step-by-step explanation:
In the question, the angles proves that this triangle is an isoceles triangle.
So we can set the two sides equal:

Add

to both sides of the equation:

Divide both sides by 2:

We find that

. AC is also x, so, it is 6 too.
Answer:
This isnt much of an answer just something to help-
Try doing A(1 + B)^I
Answer:
it indicates that it is infinitely many solutions