х + х - 5 + 1,75х + 1,75х + 3 = 8,5
5,5х = 8,5 + 5 - 3
5,5х = 10,5
х = 10,5 : 5,5
х = 105/55
х = 21/11
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х + х - 5 + 1,75х + 1,75х + 3 = 8,5
5,5х = 8,5 + 5 - 3
5,5х = 10,5
х = 10,5 : 5,5
х = 105/55
х = 21/11
х = 1 целая 10/11