QUADRILATERAL ABCD IS A RECTRANGLE

IF AC=2X+13 AND DB=4X-1 FIND DB

3 answers

in a rectangle the diagonals are equal.

2x+13 = 4x-1
2x = 14
x=7

AC = DB = 27
27
If AC = x + 3 and DB = 3x – 19, find AC.