Предмет: Математика, автор: nastia123turina

составь уравнение и реши его методом весов:задуманное число увеличили в 2.7 раза,затем уменьшили на 8. В результате получили число,на 5.6 большее задуманного числа. Какое число задумали

Ответы

Автор ответа: Агаталове
0
 пусть  х - это задуманное число
2,7х-8=х+5,6
2,7х-х=5,6+8
1,7х=13,6
х=8
Ответ: 8 - задуманное число
Автор ответа: Аноним
0
Пусть задумали число х 
2,7х-8=х+5,6
2,7х-8-5,6=х+5,6-5,6
2,7х-13,6=х
2,7х-х-13,6=х-х
1,7х-13,6=0
1,7х-13,6+13,6=0+13,6
1,7х=13,6
1,7х:1,7=13,6:1,7
х=8
8 задуманное число

Автор ответа: Аноним
0
Решала методом весов
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