2x+18*(6x/9)+17*(2x/9)=12.8
2x+12x+34x/9=12.8
160x/9=12.8
x=12.8*9/160=0.72
2x+18*(6x/9)+17*(2x/9)=12.8
2x+18*(6x/9)+17*(2x/9)=12.8
數(shù)學(xué)人氣：603 ℃時(shí)間：2020-05-08 15:24:40
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