a) 3 x + 2 (x – 2) = 5 x – 4 b) – 2 (1 – 2x) – (1 - 2x) = - x – 2 c) 2 x + 4 = 3 x + 3 (x – 2) – 4 d) 5 (2 x – 2) – 4 x = - 3 (2 – x)
Respuestas a la pregunta
Respuesta:
a) 3 x + 2 (x – 2) = 5 x – 4
3x + 2x - 4 = 5x - 4
5x - 4 = 5x - 4
5x - 5x = - 4 + 4
0 = 0
b) – 2 (1 – 2x) – (1 - 2x) = - x – 2
- 2 + 4x - 1 + 2x = - x - 2
- 3 + 6x = - x - 2
6x + x = - 2 + 3
7x = 1
x = 1/7
c) 2 x + 4 = 3 x + 3 (x – 2) – 4
2x + 4 = 3x + 3x - 6 - 4
2x + 4 = 6x - 10
4 + 10 = 6x - 2x
14 = 4x
14/4 = x (simplificas)
7/2 = x
d) 5 (2 x – 2) – 4 x = - 3 (2 – x)
10x - 10 - 4x = - 6 + 3x
6x - 10 = - 6 + 3x
6x - 3x = - 6 + 10
3x = 4
x = 4/3
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b) – 2 (1 – 2x) – (1 - 2x) = - x – 2
c) 2 x + 4 = 3 x + 3 (x – 2) – 4
d) 5 (2 x – 2) – 4 x = - 3 (2 – x)