Question

Two streets from an intersection. C and D are supplementary angles. If the measure of C is 128 and the measure of D is two times the value of x, what is the value of x?

Answer 1

26 is your answer.
For c and d to be supplementary angles, they have to equal 180 degrees. so to find d, you take 180-128= 52. D=52 and if d is twice the value of X, 52/2 = x. So x = 26. Hope this helps!