Решите уравнение пжжжжпжжжпжжжпжпжпжпж:200*(x+71)=54000;900*(16-c)=5400;400*(x-12)=3600

200*(x+71)=54000х+71=54000:200х+71=270х=270-71х=199900*(16-c)=540016-с=5400:90016-с=6-с=6-16-с=-10с=10400*(x-12)=3600х-12=3600:400х-12=9х=9+12х=21