Respuestas
Respuesta:
1 - 8x - 4 + 3x = 7x + x + 14
8x + 3x - 7x - x = 14 + 4
11x - 7x - x = 18
4x - x = 18
3x = 18
x =
x = 6
2- 3x + { -5x - (x + 3)} = 8x + ( - 5x - 9 )
3x + { -5x - x - 3 } = 8x - 5x - 9
3x - 5x - x -3 = 8x - 5x - 9
3x - 5x - x - 8x + 5x = -9 + 3
-2x - x - 8x + 5x = -6
-3x - 8x + 5x = -6
-11x + 5x = -6
-6x = -6 ← como es negativo lo multiplicamos por -1
6x = 6
x =
x = 1
3- 7 (18 - x) -6 (3 -5x) = -(7x + 9) -3 (2x + 5) -12
126 - 7x - 18 + 30x = -7x - 9 - 6x - 15 -12
7x + 6x - 7x + 30x = - 126 + 18 - 9 - 15 - 12
13x - 7x + 30x = -108 - 9 - 15 - 12
6x + 30x = -117 - 15 - 12
36x = -132 - 12
36x = -144
x =
x = -4
4- 5 - 6 ( - 3 - 7) = x (x-3) - 2x (x+5) - 2
5 -6 ( -10) = x (x-3) - 2x (x+5) - 2
5 (1 - 2x + ) + 60 = - 3x - 2x (x+5) - 2
5 - 10x + - + 60 = - 3x - - 10x - 2
- 10x + 65 = - 13x - 2
- 10x + 65 - 65 = - 13x - 2 - 65
- 10x = - 13x - 67
- - 10x - ( - 13x)= - 13x - 67 - ( - 13x)
3x = - 67
x = .
5- (x+1) (x+2) (x+3) = (x-2) (x+1) (x+1)
(x+1) (x+2) (x+3) - (x-2) (x+1) (x+1) = (x+2) (x+1) (x+1) - (x-2)(x+1)(x+1)
(x+1) (x+2) (x+3) - (x-2) (x+1) (x+1) = 0
(x+1) ((x+2) (x+3) - (x-2) (x+1)) = 0 → Factorizar..
(x+1) (6x+8) = 0
2(x+1) (3x+4) = 0
x = -1,x =
Espero que te ayude :'3