Question

Б) (2a - 5) - (7 - 2a + 4). в) -4×( 1,5с - 1) + 3(с - 5). г) 2a - 3b - 5a + 7b. д) 4×(3x - y) - 5 × ( x + y). Помогите очень надо! Хотя-бы один из них , с заранее спасибо! с:

Answer 1

Решение смотри на фотографии

Answer 2

Task B: (2a - 5) - (7 - 2a + 4)

To simplify the expression (2a - 5) - (7 - 2a + 4), we can remove the parentheses and combine like terms.

First, let's remove the parentheses: (2a - 5) - (7 - 2a + 4) = 2a - 5 - 7 + 2a - 4

Next, let's combine like terms: 2a + 2a - 5 - 7 - 4 = 4a - 16

Therefore, the simplified expression is 4a - 16.

Task C: -4 × (1.5c - 1) + 3(c - 5)

To simplify the expression -4 × (1.5c - 1) + 3(c - 5), we can remove the parentheses and combine like terms.

First, let's remove the parentheses: -4 × (1.5c - 1) + 3(c - 5) = -4 × 1.5c + 4 + 3c - 15

Next, let's combine like terms: -6c + 4 + 3c - 15 = -3c - 11

Therefore, the simplified expression is -3c - 11.

Task D: 2a - 3b - 5a + 7b

To simplify the expression 2a - 3b - 5a + 7b, we can combine like terms.

Let's combine the terms with 'a' and the terms with 'b': (2a - 5a) + (-3b + 7b) = -3a + 4b

Therefore, the simplified expression is -3a + 4b.

Task E: 4 × (3x - y) - 5 × (x + y)

To simplify the expression 4 × (3x - y) - 5 × (x + y), we can remove the parentheses and combine like terms.

First, let's remove the parentheses: 4 × (3x - y) - 5 × (x + y) = 12x - 4y - 5x - 5y

Next, let's combine like terms: 12x - 5x - 4y - 5y = 7x - 9y

Therefore, the simplified expression is 7x - 9y.

I hope this helps! Let me know if you have any further questions.