Question

9⋅(7a−7)−7⋅(9a+7)=-112

Answer 1

Ответ:

а= -98

Пошаговое объяснение:

9⋅(7a−7)−7⋅(9a+7)=-112

9*7а-9*7-7*9а+7*7= -112

63а-63-63а+49= -112

63а-63а= -112+63-49

а= -98

Answer 2

Пошаговое объяснение:

9⋅(7a−7)−7⋅(9a+7)=-112

63a-63-63a-49=-112

сокращаем противоположные выражения:

-63-49=-112

-112=-112

утверждение справедливо для любого значения а

Answer 3

To solve for the value of 'a' in the equation 9*(7a - 7) - 7*(9a + 7) = -112, follow these steps:

1. Distribute the numbers within the parentheses: 63a - 63 - 63a - 49 = -112

2. Combine like terms on both sides of the equation: (63a - 63a) + (-63 - 49) = -112 -112 = -112

Since both sides of the equation are equal (-112 = -112), this equation is an identity. This means that 'a' can be any real number and the equation will still hold true. Therefore, the solution for 'a' is all real numbers.