(3 1/8 +1 3/4) X=2 1/6
(2 1/12-1 5/6) X=3/4
(3 1/8+1 3/4)x=2 1/6(3 1/8+1 6/8)x=2 1/64 7/8x=2 1/6X=2 1/6:4 7/8X=13/6:39/8X=13/6*8/39X=4/9
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