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Answered 2013-04-21 20:00:16

a = 2b - 2

c = b + 3

so 2b - 2 + b + b + 3 = 25

that is, 4b + 1 = 25 ie 4b = 24 and so b = 6

then a = 2b - 2 = 12 - 2 = 10

and c = b + 3 = 6 + 3 = 9

So the three sides are 10m, 6m and 9m.

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