Twice the width is 4 x 2 = <<4*2=8>>8 meters.
The length of the rectangular flowerbed is 8 - 1= <<8-1=7>>7 meters.
Since the rectangular flower bed has 2 equal lengths, then it needs 7 x 2 = <<7*2=14>>14 meters of fence.
The rectangular bed has also 2 equal widths, so it needs 4 x 2 = <<8=8>>8 meters of fence.
Therefore, the rectangular flower bed needs a total of 14 + 8 = <<14+8=22>>22 meters of fence.
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