Question

4(15x-4y)-2(12y-5x) если 4y-7x=0,8​

Answer 1

Ответ:

-8

Пошаговое объяснение:

4(15x-4y)-2(12y-5x)=

раскроем скобки и приведём подобные:

=60х-16у-24у+10х=70х-40у=

Представим в таком виде:

=-10(4у-7х)

А так как 4y-7x=0,8​⇒-10(4у-7х)=-10*0,8=-8

Answer 2

Ответ:

-8

Пошаговое объяснение:

Если 4y-7x=0,8  |×10/2

20y-35x=4

4(15x-4y)-2(12y-5x)=2(30x-8y-12y+5x)=2(35x-20y)=2·(-4)=-8

Answer 3

To simplify the expression $4(15x-4y)-2(12y-5x)$, we first need to expand the terms inside the parentheses and then combine like terms. Let's do the calculations step by step:

1. Distribute the coefficients outside the parentheses: $4(15x-4y) = 4 \cdot 15x - 4 \cdot 4y = 60x - 16y$ $2(12y-5x) = 2 \cdot 12y - 2 \cdot 5x = 24y - 10x$

2. Now, rewrite the original expression with the simplified terms: $4(15x-4y) - 2(12y-5x) = (60x - 16y) - (24y - 10x)$

3. Now combine like terms by performing the operations inside the parentheses: $60x - 16y - 24y + 10x$

4. Group the x-terms and y-terms together: $60x + 10x - 16y - 24y$

5. Combine the x-terms and y-terms: $70x - 40y$

Now, the simplified expression is $70x - 40y$. However, you also mentioned that $4y - 7x = 0.8$. If you would like to use this information to further simplify the expression or solve for variables, please let me know, and I can assist you accordingly.