х-7/8+83/24=61/12
х-7/8=61/12-83/24
х-7/8=(122-83)/24
х-7/8=39/24
х=39/24+7/8
х=(39+21)/24
х=60/24=2,5
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х-7/8+83/24=61/12
х-7/8=61/12-83/24
х-7/8=(122-83)/24
х-7/8=39/24
х=39/24+7/8
х=(39+21)/24
х=60/24=2,5