Х - 2 7/8 = 1 1/6
х = 1 1/6 + 2 7/8 = (1 +2)+(1/6+7/8) = 3+(4/24 +21/24)= 3 25/24 = 4 1/24
х = 4 1/24
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х + 2,25 = 6 5/9 - 2 1/2
х + 2,25 = 4+(5/9-1/2)=4+(10/18-9/18)= 4 1/18
х + 2,25 = 4 1/18
х + 2 1/4 = 4 1/18
х = 4 1/18 - 2 1/4 = (4-2)+(1/18-1/4)=2+(2/36-9/36) = 2 -7/36= 1 29/36
х = 1 29/36