Question

(y-7)-(y-4)=2y решить уравнение

Answer 1

Ответ:

y = - 1,5

Объяснение:

Раскрываем скобки в левой части уравнения. Не забываем, что по правилу, если перед скобкой стоит минус "-", то все знаки в этой скобке меняются на противоположные.

$(y-7)-(y-4)=2y \\ \\ y-7-y+4=2y \\ \\ -3=2y \\ \\ 2y=-3 \\ \\ y=-\frac{3}{2}=-1\frac{1}{2}=-1,5$

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Answer 2

Let's start by simplifying the left side of the equation:

(y - 7) - (y - 4) = y - 7 - y + 4

The two middle terms cancel each other out, leaving us with:

= -3

So the original equation becomes:

-3 = 2y

Now we can solve for y by dividing both sides of the equation by 2:

-3/2 = y

Therefore, the solution to the equation is:

y = -3/2 or -1.5

We can verify this solution by plugging it back into the original equation:

(y - 7) - (y - 4) = 2y

(-1.5 - 7) - (-1.5 - 4) = 2(-1.5)

-8.5 - (-5.5) = -3

-3 = -3

The left and right sides of the equation are equal, so our solution is correct.