What is 6x+16=9x=11 in the equation?

Are the corresponding angles congruent? explain why or why not.

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30