Question

7x - y - 4 = 0 x = -2 1/7 (дробь)

Answer 1

Відповідь:

Пояснення:

Answer 2

Ответ:

почему 2 равно? я как бы понять не могу, может что-то не так?

Answer 3

To find the value of y when x = -2 1/7 in the equation 7x - y - 4 = 0, we can substitute the given value of x into the equation and solve for y.

First, let's convert the mixed number -2 1/7 to an improper fraction: -2 1/7 = -2 + 1/7 = (-2 * 7 + 1) / 7 = (-14 + 1) / 7 = -13/7.

Now, we substitute x = -13/7 into the equation:

7 * (-13/7) - y - 4 = 0

Simplifying, we get:

-13 - y - 4 = 0

Next, we combine like terms:

-17 - y = 0

To isolate y, we add 17 to both sides of the equation:

-17 - y + 17 = 0 + 17

Simplifying further:

• y = 17

Finally, we multiply both sides of the equation by -1 to solve for y:

y = -17

Therefore, when x = -2 1/7, the value of y in the equation 7x - y - 4 = 0 is y = -17.