х = 4 - 2 1/2
х = 4 - 5/2
х = 3/2 или х = 1,5
2 3/8 - 1/2 = х
х = 15/8
х = 1 7/8
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х = 4 - 2 1/2
х = 4 - 5/2
х = 3/2 или х = 1,5
2 3/8 - 1/2 = х
х = 15/8
х = 1 7/8