Question

Функция у(х), где Х-2 У=——— Х+5 У=-2,5 Х неизвестен Найти х

Answer 1

$y= \frac{x-2}{x+5}, \\ -2,5= \frac{x-2}{x+5},$
Решаем по основному свойству пропорции. Произведение крайних членов пропорции равно произведению средних:
-2,5(х+5)=х-2
-2,5х - 12,5 = х - 2,
-2,5х - х = - 2 + 12,5
-3,5 х = 10, 5
 х = 10,5 : ( -3,5)
х = - 3

Answer 2

The problem:

We are given the function u(x), where x-2*u=5*x+u=-2.5*x. We need to find the value of x.

Setting up the equations:

Based on the information given, we can set up two equations: 1) x-2*u=5*x+u 2) -2.5*x

Solving the simultaneous equations:

To solve simultaneous equations, we eliminate one variable. From equation 1, we can isolate u: u=(5*x-x)/(2-1) = 2*x Substitute u=2*x into equation 2: -2.5*x = -2.5*x

Therefore, the value of x that satisfies both equations is any real number.