Question

-0,8x-(0,6x-0,7y) если 2x-y=8ПО действиям позязя БЕЗ ДЕЙСТВИЙ БУДУ УДОЛять

Answer 1

Ответ:

Ответ после приведения подобных  и преобразования для подстановки     -0,7*(2х-у)=-5,6

Пошаговое объяснение:   Дано 2х-у=8

-0,8х-(0,6х-0,7у) = -0,8х-0,6х+0,7у = -1,4х+0,7у  |:(-0,7)

-0,7*(2х-у)  (подставим 8 вместо 2х-у)  = -0,7*(8)= - 5,6

Answer 2

To solve the equation -0.8x - (0.6x - 0.7y) when 2x - y = 8, we can follow these steps:

1. Simplify the equation: - Distribute the negative sign to the terms inside the parentheses: -0.8x - 0.6x + 0.7y - Combine like terms: -1.4x + 0.7y

2. Substitute the value of y from the second equation into the first equation: 2x - y = 8 y = 2x - 8

3. Substitute the value of y in terms of x into the simplified equation: -1.4x + 0.7(2x - 8)

4. Simplify the expression: -1.4x + 1.4x - 5.6

5. Combine like terms: -5.6

Therefore, the solution to the equation -0.8x - (0.6x - 0.7y) when 2x - y = 8 is -5.6.

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