Mejor respuesta

Anaranjogonz
4

1)

2 * (3x + 5) = 82

6x + 10 = 82

6x = 82 - 10

6x = 72

x = 72 / 6

x = 12

2)

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

4 + 4x = 2 * 4x

4 + 4x = 8x

4x - 8x = - 4 - 4x = - 4

x = - 4 / - 4

x = 1

3)

2 * (2x + 8) = 5x

4x + 16 = 5x

4x - 5x = - 16 - x = - 16

x = 16

4)

3 * (3x + 6) = 10x

9x + 18 = 10x

9x - 10x = - 18 - x = - 18

x = 18

5)

4 * (4x + 6) = 18x

16x + 24 = 18x

16x - 18x = - 24 - 2x = - 24

x = - 24 / - 2

x = 12

6)

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

2 + 2x = 3 * x

2x - 3x = - 2 - x = - 2

x = 2

7)

3 + 3x = 2 * (2 + x)

3 + 3x = 4 + 2x

3x - 2x = 4 - 3

x = 1

8)

5 * (5 - x) = 2 * (2 + x)

25 - 5x = 4 + 2x - 5x - 2x = 4 - 25 - 7x = - 21

x = - 21 / - 7

x = 3

Saludos.