How to use pythagorean theorem with a rectangle? i have all measurements but i don't understand how to use it with the pythagorean theorem

(05.03 mc) part a: explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−2 intersect are the solutions of the equation 4x = 2x−2. (4 points) part b: make tables to find the solution to 4x = 2x−2. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 4x = 2x−2 graphically? (2 points)

In the diagram below,abc is congruent to dec what is the value of x

Im so bad at fractions they are not my best math thing to work on