Question

x + 1 = 2 (x -1) x=

9 (x + 7) = 2 (5x - 7) x=

3 (2x - 1) = 4 (3x - 4) x=

Answer 1

Respuesta:

x = 2

x = 77

x = 6/13

Explicación paso a paso:

x + 1 = 2 (x -1)

x + 1 = 2x - 1

1 + 1 = 2x - x

2 = x

9 (x + 7) = 2 (5x - 7)

9x + 63 = 10x - 14

63 + 14 = 10x - 9x

77 =  x

3 (2x - 1) = 4 (3x - 4)

6x -3 = 12x - 16

16 - 3 = 12x - 6x

13 = 6x

x = 6/13