Question

-0,8x -(0,6x - 0,7y) ,если 2x - y = -8

Answer 1

Ответ:5,6

Пошаговое объяснение:

Answer 2

-0.8х-0.6х+0.7y=-1.4x+0.7y=-0.7*(2x-y)

если 2х-у=-8, то

-0.7*(-8)=5.6

Answer 3

To answer this question, we need to simplify the expression and then substitute the value of y from the given equation. Here are the steps:

- Simplify the expression: -0.8x - (0.6x - 0.7y) * Distribute the negative sign: -0.8x - 0.6x + 0.7y * Combine like terms: -1.4x + 0.7y - Substitute the value of y from the equation: 2x - y = -8 * Solve for y: y = 2x + 8 * Plug in y into the expression: -1.4x + 0.7(2x + 8) - Simplify the expression further: * Distribute 0.7: -1.4x + 1.4x + 5.6 * Combine like terms: 5.6

The final answer is 5.6. You can also use online tools like [Mathway](https://www.mathway.com/ru/Algebra) or [Chegg Math Solver](https://www.chegg.com/math-solver/) to check your answer or get more detailed explanations. You can also use [Desmos](https://www.desmos.com/calculator?lang=en-GB) to graph the expression and the equation. I hope this helps.