Question

-21-6x=122+7x.....................

Answer 1

Решение:

- 21 - 6x = 122 + 7x;

- 6x - 7x = 122 + 21

- 13x = 143

x = 143 ÷ (- 13)

x = - 11.

Ответ: - 11.

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Answer 2

Пошаговое объяснение:

Решение уравнения в тетради

Answer 3

To solve the equation -21 - 6x = 122 + 7x, we can start by simplifying the equation by combining like terms.

Let's bring all the x terms to one side and the constant terms to the other side.

-21 - 6x = 122 + 7x

Let's add 6x to both sides:

-21 - 6x + 6x = 122 + 7x + 6x

Simplifying:

-21 = 122 + 13x

Next, let's subtract 122 from both sides:

-21 - 122 = 122 + 13x - 122

Simplifying:

-143 = 13x

To isolate x, we divide both sides of the equation by 13:

(-143)/13 = (13x)/13

Simplifying:

-11 = x

Therefore, the solution to the equation -21 - 6x = 122 + 7x is x = -11.