Respuestas
a) 3 + 4 (x - 2) = -3 - 5(x - 5)
3 + 4x - 8 = -3 - 5x - 5
3 - 8 + 3 + 5 = 5x - 4x
- 5 + 8 = x
3 = x
b) 3x + 5 (x + 2) = 4 (x + 3) + 6
3x + 5x + 10 = 4x + 12 + 6
3x + 5x + 4x = -12 + 6 - 10
12x = 8
c) 5 - 4 (3x + 1) = 1 + 4 (2x + 20)
5 - 12x + 4 = 1 + 8x + 20
12x - 8x = 1 + 20 + 5 + 4
4x = 30
x = 7.5
)
¡Hola¡
Vamos con las soluciones:
a) 3 + 4 (x - 2) = -3 - 5(x - 5)
3 + 4x - 8 = -3 - 5x - 5
3 - 8 + 3 + 5 = 5x - 4x
- 5 + 8 = x
3 = x
b) 3x + 5 (x + 2) = 4 (x + 3) + 6
3x + 5x + 10 = 4x + 12 + 6
3x + 5x + 4x = -12 + 6 - 10
12x = 8
c) 5 - 4 (3x + 1) = 1 + 4 (2x + 20)
5 - 12x + 4 = 1 + 8x + 20
12x - 8x = 1 + 20 + 5 + 4
4x = 30
x = 7.5
Saludos