【参考答案】①3/4x-16.8=20.6 3/4x=37.4x=748/15②7/8x-0.87=16.9 7/8x=17.77x=3554/175③3÷2x=6.2 (1/2-5/11)*(5/9*2/3) 3÷2x=6.2×(1/22)×(10/27)3÷2x=31/2972x=891/31x=891/62④8.6-3/4x=2.73/4x=5.9x=118/1...3÷2x=6.2(1/2-5/11)*(5/9*2/3) 这两题不是连起来的是分散的③3÷2x=6.22x=3÷6.22x=15/31x=15/62