Question

Розкрийте дужки і зведіть подібні доданки: (3х–2) – (5х–8); 2) 20+ 5(0,2у–4);3) 3(а–3b) – 5(a–2b);4) 2(3х–8) –5(2х+7);5) –(5х–5) – (– (3–6х))+13х.

Answer 1

Відповідь:

Пояснення:

Answer 2

1. (3x - 2) - (5x - 8)

First, distribute the negative sign to the second set of parentheses: 3x - 2 - 5x + 8

Combine like terms: (3x - 5x) + (-2 + 8) -2x + 6

So the simplified expression is -2x + 6.

2. 20 + 5(0.2y - 4)

Distribute 5 to the terms inside the parentheses: 20 + 5 * 0.2y - 5 * 4

Multiply: 20 + y - 20

Combine like terms: y

So the simplified expression is y.

3. 3(a - 3b) - 5(a - 2b)

Distribute 3 and -5 to the terms inside the parentheses: 3a - 9b - 5a + 10b

Combine like terms: (3a - 5a) + (-9b + 10b) -2a + b

So the simplified expression is -2a + b.

4. 2(3x - 8) - 5(2x + 7)

Distribute 2 and -5 to the terms inside the parentheses: 6x - 16 - 10x - 35

Combine like terms: (6x - 10x) + (-16 - 35) -4x - 51

So the simplified expression is -4x - 51.

5. -(5x - 5) - (- (3 - 6x)) + 13x

First, simplify the double negative inside the second set of parentheses: -(5x - 5) - (3 - 6x) + 13x

Distribute the negative sign to both sets of parentheses: -5x + 5 - 3 + 6x + 13x

Combine like terms: (-5x + 6x + 13x) + (5 - 3) 14x + 2

So the simplified expression is 14x + 2.