5X十2.4=9X一5.6
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5X十2.4=9X一5.6
5X十2.4=9X一5.6
5X十2.4=9X一5.6
9x-5x=2.4+5.6
4x=8
x=2
4x=8
x=2
4x=5.6+2.4
移项得4x=8
5X十2.4=9X一5.6
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