整数分数!递等式计算
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(68)5/6-1/6 (69)2/5+1/2 (70)3/4+1/6 (71)2x-2/5=27/5 (72)4x=12×4 (73)6.5+2x=16.5 (74)8.1÷27×3 (75)1-2/5-17/50 (76)4/7-2/5 (77)83 (78)5/6-1/4+2/3 (79)11/28+(5/14+3/7)(80)7-(3/4-2/5)(81)x+1/3=7/9 (82)2x-1/6=5/6 (83)3/5-x=1/4 (84)x-4/5x-1.6=1.5 (85)14.6-(4.6+7.2)(86)1-1/2-1/3-1/6 (87)3/10-7/30+4/10
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