百事通(presto)钻头含钴高速钢直柄麻花钻咀(3.9x43.0x75mm)
3.9x3.9in bathroom floor drain high grade antique shower dra
3时,由于把"一"看成了" ",得到的解是x=3.9.你知道正确的解是多少
8 7x=3.9 2x 3x=60180 6x=330 15x÷2=60 x-0.8x=10_百度教育
8 2.4x=4.8 x=2 5/6x 75%=4 5/6x=4-3/4 10x=48-9 10x=3
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