4343结果乘以2最后减去这个数的10倍等于多？

肆意数为x

[(x+52.8)*5-3.4343]/0.5-10*x

=(5x+264-3.4343)*2-10x

=10x+264*2-2*3.4343-10x

=10x-10x+264*2-2*3.4343

=264*2-2*3.4343

=528-6.8686

=521.1314

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