3. In the figure, AB || CD || EF. a. If AC = 8, AE = 20, BF = 15 and AF = 17.5, find BD, DF, AX and XF. b. If BD = 2x + 1, DF = 3x, BF = 21, AE = 28 and AF = 23.8, find AC, CE, AX and XF. ( B X D F E

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