Question

0,2(6x-5)-4(0,2x-2) 3/4*(4/3x-4)-8(2 1/4x + 3/8) 1/3(3x-6)-2/7(7x-21)

Answer 1

Ответ:

Объяснение:

раскрываем скобки:

0.2*6x - 0.2*5 - 4*0.2x -(-4)*2 = 1.2x - 1 - 0.8x + 8 = 0.4x +7

3/4*1/3*x-3/4*4 - 8*9/4x - 8*3/8 = x -3 -2*9x - 3 = -17x-6

x - 2 - 2x + 3 = -x+1

Answer 2

Let's simplify each expression step by step:

1. 0.2(6x - 5) - 4(0.2x - 2)

First, distribute the 0.2 and -4:

0.2 * 6x - 0.2 * 5 - 4 * 0.2x + 4 * 2

1.2x - 1 - 0.8x + 8

Combine like terms:

(1.2x - 0.8x) + (8 - 1)

0.4x + 7

2. (3/4)(4/3x - 4) - 8(2 1/4x + 3/8)

Convert 2 1/4 to an improper fraction: 9/4

(3/4)(4/3x - 4) - 8(9/4x + 3/8)

First, distribute 3/4 and -8:

(3/4) * (4/3x) - (3/4) * 4 - 8 * (9/4x) - 8 * (3/8)

x - 3 - 18x - 3

Combine like terms:

(x - 18x) + (-3 - 3)

-17x - 6

3. (1/3)(3x - 6) - (2/7)(7x - 21)

First, distribute 1/3 and -2/7:

(1/3) * (3x) - (1/3) * 6 - (2/7) * (7x) + (2/7) * 21

x - 2 - 2x + 6

Combine like terms:

(x - 2x) + (-2 + 6)

-x + 4

If you have any further questions, feel free to ask!