6.2x+2X=12.3 [2]5.1X-4X=45.1 [3]X-0.45=11 全部都要解出来

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6.2x+2X=12.3 [2]5.1X-4X=45.1 [3]X-0.45=11 全部都要解出来
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6.2x+2X=12.3 [2]5.1X-4X=45.1 [3]X-0.45=11 全部都要解出来
6.2x+2X=12.3 [2]5.1X-4X=45.1 [3]X-0.45=11 全部都要解出来

6.2x+2X=12.3 [2]5.1X-4X=45.1 [3]X-0.45=11 全部都要解出来
6.2x+2X=12.3 5.1X-4X=45.1 X-0.45=11
  8.2x=12.3 1.1x=45.1 x=11+0.45
x=1.5 x=41 x=11.45
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