Question

¿Cuanto es?


3 (1- ( 2- X - 1)) = 9


4X- 5= 2x - 5


5x - 2 = 3x + 1


3x - 3 = x + 3

Answer 1

Solución:

1)

$3(1 - (2 - x - 1)) = 9 \\ 3(1 - (1 - x)) = 9 \\ 3(1 - 1 + x) = 9 \\ 3(x) = 9 \\ 3x = 9 \\ x = \frac{9}{3} \\ x = 3$

2)

$4x - 5 = 2x - 5 \\ 4x - 2x = - 5 + 5 \\ 2x = 0 \\ x = \frac{0}{2} \\ x = 0$

3)

$5x - 2 = 3x + 1 \\ 5x - 3x = 1 + 2 \\ 2x = 3 \\ x = \frac{3}{2} \\ x = 1.5$

4)

$3x - 3 = x + 3 \\ 3x - x = 3 + 3 \\ 2x = 6 \\ x = \frac{6}{2} \\ x = 3$