(72*100-52*10)-(5*х+90)=23*100+42-10
Ответ:
(72*100-52*10)-(5*х+90)=23*100+42-10;
(7200-520)-(5х+90)=2300+32 ;
6680-5х-90=2332;
6590-5х=2332 ;
5х = 6590-2332;
5х = 4258 ;
х = 851.6 ;
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