х = 2 7/15 + 18 1/5
х = 2 7/15 + 18 3/15
х = 20 10/15
х= 20 2/3
б) (х+5/6)+2/3 = 1 13/18
(х+5/6) = 1 13/18 - 2/3
(х+5/6) = 1 13/18 - 12/18
х+5/6 = 1 1/8
х = 1 1/8-5/6
х = 1 3/24 - 20/24
х = 24+3/24 - 20/24
х = 7/24
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Answers & Comments
х = 2 7/15 + 18 1/5
х = 2 7/15 + 18 3/15
х = 20 10/15
х= 20 2/3
б) (х+5/6)+2/3 = 1 13/18
(х+5/6) = 1 13/18 - 2/3
(х+5/6) = 1 13/18 - 12/18
х+5/6 = 1 1/8
х = 1 1/8-5/6
х = 1 3/24 - 20/24
х = 24+3/24 - 20/24
х = 7/24