SOLUTION: in rectangle ABCD, diagonal AC=8x-4 and diagonal BD=5x+5. Find AC

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Question 1199972: in rectangle ABCD, diagonal AC=8x-4 and diagonal BD=5x+5. Find AC
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
.

      AC    =  BD

    8x-4    = 5x+5

    8x - 5x = 5 + 4

      3x    =   9

       x    =   9/3 = 3

    AC = 8x-4 = 8*3-4 = 24 - 4 = 20.    ANSWER

Solved.