Предмет: Математика, автор: reginaaleksandrova07

Проверь, будет ли корнем уравнения 0,4x−12=−10 число −4?​

Ответы

Автор ответа: lenyashastin
1

Решение:

Подставляем x = -4:

0,4*(-4) - 12 = -10

-1,6 - 12 = - 10

-13,6 = -10 ⇔ ЛОЖЬ!

Ответ: нет.

Автор ответа: Auri567
0

Ответ:

0,4х-12=-10

0,4х=-10+12

0,4х=2

х=2÷0,4

х=5

-4 не является корнем уравнения

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