Предмет: Математика, автор: Gogalvova

Решите уравнение 7x-9=40

Gogalvova: привет

Ответы

Автор ответа: artemusolcev40

Пошаговое объяснение:

7x=40+9

7x=49

x=7

-----------------

Автор ответа: Alyssa08

Решение:

$7x-9=40$

$7x=40+9$

$7x=49$

$x=7$

Проверка:

$7\cdot7-9=40$

$(7-3)(7+3)=40$

$40=40$

Ответ: x = 7.

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