Предмет: Математика, автор: alinarusakova

(с - 130)*50 равно 500; х:(240:2)равно 15.

Ответы

Автор ответа: Vladlena07

2

(с-130)*50=500
с-130=500:50
с-130=10
с=10+130
с=140

х:(240:2)=15
х:120=15
х=15*120
х=1800

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