Question

ayudenme pliz ....
mi tarea es para mañana​

Answer 1

Explicación paso a paso:

1).

(4/3)(y - 1) = (2/3)(y + 4)

4(y - 1) = 2(y + 4)

4y - 4 = 2y + 8

4y - 2y = 8 + 4

2y = 12

y = 6

2).

4x(5x - 3) = 5x(4x + 2)

20x² - 12x = 20x² + 10x

12x + 10x = 0

22x = 0

x = 0

3).

(x - 8)² - (x - 7)² = x + 1

x² - 16x + 64 - (x² - 14x + 49) = x + 1

x² - 16x + 64 - x² + 14x - 49 = x + 1

- 16x + 64 + 14x - 49 = x + 1

16x - 14x + x = 64 - 49 - 1

3x = 14

x = 14/3

x ≈ 4,67

4).

(x + 8)(x - 12) = 3 + (x - 11)²

x² + 8x - 12x - 96 = 3 + x² - 11x - 11x + 121

8x - 12x + 11x + 11x = 96 + 3 + 121

18x = 220

x = 110/9

x ≈ 12,22

5).

7/(x² - x - 72) + 3/(x + 8) = 5/(x - 9)

7/(x - 9)(x + 8) + 3/(x + 8) = 5/(x - 9)

7 + 3(x - 9) = 5(x + 8)

7 + 3x -27 = 5x + 40

5x - 3x = 7 - 27 - 40

2x = -60

x = -30

6).

8/(9x² - 4) = 5/(3x - 2) + 4/(3x + 2)

8/(3x - 2)(3x + 2) = 5/(3x - 2) + 4/(3x + 2)

8 = 5(3x + 2) + 4(3x - 2)

8 = 15x + 10 + 12x - 8

15x + 12x = 8 + 8 - 10

27x = 6

x = 2/9

x ≈ 0,22