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Perimeter = lenght×2 + width×2Let x represent the width80 = 2(2x - 5) + 2xFind for x80 = -10 + 4x + 2x80 + 10 = 6x90 = 6x90/6 = xx = 15The width is 15 cmThe length is 2×15 - 5 = 25