Question

2) 4(x + y) + 5(2x - y); решить пример​

Answer 1

Ответ:

4x-2y=2,

2x+y=5;|*2

4x-2y=2,

4x+2y=10;

8x=12;

2x+y=5;

x=1,5

y=2

Ответ:(1,5;2)

Сумма:

1,5+2=3,5

Answer 2

To simplify the expression, you need to apply the distributive property and combine like terms. Let's go step by step:

1. Distributive property: 4(x + y) + 5(2x - y) = 4x + 4y + 52x - 5y

2. Combine like terms: Now, let's group the terms with the same variable together: (4x + 52x) + (4y - 5y)

3. Perform the operations: 4x + 52x = 4x + 10x = 14x 4y - 5y = -y

4. Final answer: Putting it all together, the simplified expression is: 14x - y