x-16-百分之30=54
x-16-0.3=54
x-16.3=54
x=54-16.3
x=37.7对不起啊，弄错了，是：x-16-30%x =54x-16-30%x =54x-16-0.3x=540.7x-16=540.7x=54+160.7x=70x=100
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