Вопрос школьника по предмету Математика
4-2a=-2(3+2a)
Найти корень уравнения.
Помогите пожалуйста)
Ответ учителя по предмету Математика
4-2a=-2(3+2a)
4- 2а = -6 — 4а
4+6 = -4а+2а
10 = -2а (:-1)
2а = -10
а = -10:2
а = -5
ответ : а=-5
проверка
4-2*-5=-2(3+2*-5)
4+10 = -2(3-10)
14 = -6+20
14 = 14
ответ верный
Похожие вопросы от пользователей
Найдите наименьшее положительное целое число, цифры которого идут по убыванию слева направо и его сумма цифр равна 27.
Помогите решить задачу с условием
1. Were you at home last night? Yes, I was / No, I wasn´t 2. Was it hot yesterday? ……………………………….. 3. Were your friends at home last Monday? ………………………………. 4. Was your father at work this morning? ………………………………. 5. Were you in class yesterday morning? ……………………………….
—
Put the sentences into simple past.
We move to a new house. →
They bring a sandwich. →
He doesn’t do the homework. →
They sell cars. →
Does he visit his friends? →
Write sentences in simple past.
Janet / miss / the bus →
she / tidy / her room →
Nancy / watch / not / television→
she / read / a book →