Question

-2,5(2у-4х)+3(2у-7х)

Answer 1

-5у+10х+6у-21х=у-11х

Answer 2

Раскрывем скобки последовательно.

1. -2.5*2у + 2.5*4х = -5у + 10х

2. 3*2у - 3*7х = 6у - 21х

3. -5у + 10х + 6у - 21х = у - 11х

Ответ: у - 11х.

Answer 3

To simplify the expression, we will distribute the coefficients outside the parentheses and then combine like terms:

-2 * (2y - 4x) + 3 * (2y - 7x)

Step 1: Distribute the coefficients:

-2 * 2y + (-2) * (-4x) + 3 * 2y + 3 * (-7x)

Step 2: Simplify each term:

-4y + 8x + 6y - 21x

Step 3: Combine like terms:

(-4y + 6y) + (8x - 21x)

Step 4: Further simplification:

2y - 13x

So, the simplified expression is: 2y - 13x.