Предмет: Математика, автор: clue4444

2x+5=7x+13 решите уровнени

Ответы

Автор ответа: annZ5555

0

2x-7x=13-5
-5x=8
x=8 делить (-5)
х=1,6

Timazzzzeo86rus: 2x+5=7x+13

Автор ответа: Timazzzzeo86rus

0

2x+5=7x+13
2х-7х=13-5
-5х=8
-х=8/5
-х=1,6
х= -1,6

Проверяем
2* (-1,6)+5=7*(-1,6) +13
-3,2+5=-11,2+13
1,8=1.8

Ответ х =-1,6

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