Question

ayuda es para hoy por favor ​

Answer 1

Respuesta:

:)

Explicación paso a paso:

28. (8x - 6) / 2 = 3x - (6 - 2x) + 7

(8x - 6) = [3x - 6 + 2x + 7](2)

8x - 6 = 6x - 12 + 4x + 14

8x - 6x - 4x = 6 - 12 + 14

2x = 8

x = 8/2

x = 4

29. (10x + 20)/5 - 2(2x + 3) = 3(4 - x) + 2x

(10x + 20)/5 = 3(4 - x) + 2x + 2(2x + 3)

10x + 20 = [3(4 - x) + 2x + 2(2x + 3)](5)

10x + 20 = [12 - 3x + 2x + 4x + 6](5)

10x + 20 = [18 + 3x](5)

10x + 20 = 90 + 15x

10x - 15x = 90 - 20

-5x = 70

x = 70/-5

x = -14

30. (6x - 2)/(-2) + 3x(-2 + 6) = -[3(x + 2)-1]-6

(6x - 2)/(-2) + (-6x + 18x) = -[3x + 6 - 1] - 6

(6x - 2)/(-2) -6x + 18x = -3x - 6 + 1 - 6

(6x - 2)/(-2) = -3x - 6 + 1 - 6 + 6x - 18x

(6x - 2)/(-2) = -15x - 11

(6x - 2) = [-15x - 11](-2)

6x - 2 = 30x + 22

6x - 30x = 22 + 2

-24x = 24

x = 24/-24

x = -1

31. (y-2)/3 + 8 = (-3)²

(y-2)/3 + 8 = 9

(y-2)/3 = 9 - 8

(y-2) = 1(3)

(y-2) = 3

y = 3 + 2

y = 5