Ответ:
400*(x-5)=10000
x-5=10000:400
x-5=25
x=25+5
x=30
400*(30-5)=10000
10000=10000
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Ответ:
400*(x-5)=10000
x-5=10000:400
x-5=25
x=25+5
x=30
400*(30-5)=10000
10000=10000
X-5=10 000:400
X-5=250
X=250+5
X=255