100x十2000=150x十1500
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100x十2000=150x十1500100x十2000=150x十1500100x十2000=150x十1500x=10·······································
100x十2000=150x十1500
100x十2000=150x十1500
100x十2000=150x十1500
x=10······························································································
100x十2000=150x十1500
移项得,-50x=-500
x=10
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100x-150x=1500-2000
-50x=-500
x=10
100x十2000=150x十1500
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