Question

2(4в-5а)-3(2а+3в) 3,1(x-y)+2,5(2y-4x)

Answer 1

Ответ:

Пошаговое объяснение:

2(4в-5а)-3(2а+3в)= 8b - 10a - 6a - 9b = -b - 16a

3,1(x-y)+2,5(2y-4x) = 3,1x - 3,1y + 5y - 10x = -6,9x + 1,9y

Answer 2

1)

-в-16а

2)

$= \frac{1}{10} \times ( - 69 x + 19y)$

Answer 3

To simplify the expressions, let's perform the distributive property (also known as the distributive law or the distributive property of multiplication over addition/subtraction) for each expression:

1. Simplifying 2(4в - 5а) - 3(2а + 3в):

First, apply the distributive property to each term inside the parentheses:

2 * 4в - 2 * 5а - 3 * 2а - 3 * 3в

Now, perform the multiplications:

8в - 10а - 6а - 9в

Now, combine like terms (terms with the same variables and exponents):

(8в - 9в) + (-10а - 6а)

-1в - 16а

So, the simplified expression is: -1в - 16а.

2. Simplifying 3.1(x - y) + 2.5(2y - 4x):

Again, apply the distributive property to each term inside the parentheses:

3.1 * x - 3.1 * y + 2.5 * 2y - 2.5 * 4x

Now, perform the multiplications:

3.1x - 3.1y + 5y - 10x

Now, combine like terms:

(3.1x - 10x) + (-3.1y + 5y)

-6.9x + 1.9y

So, the simplified expression is: -6.9x + 1.9y.