# in adjoining figure AE||BC, ?DAE = x, ?ACB = (x-15), ?BAC = (x/2 +y) and ?ABC = (y+15). find the value of x and y. (answer)

We do not see the figure. Yet we know line AE is parallel to line BC. THerefore, angle ABC must equal 90 degrees. From algebra we can figure from the given facts the values of X and Y. 90 = X + 15 .= Y - 15. SO, X = 105 degrees and Y = 75 degrees