Respuestas
Explicación paso a paso:
1º actividad:
a) x - 4 = 3 b) x - 2 = -5 c) x + 5 = 8
x = 3 + 4 x = -5 + 2 x = 8 - 5
x = 7 x = -3 x = 3
d) x + 6 = -2 e) 4x = 16 f) -2x = 8
x = -2 - 6 x = 16/4 x = 8/-2
x = -8 x = 4 x = -4
g) 1/3x = 5 h) -1/2x = 6 i) 1/4x = 6
x/3 = 5 -x/2 = 6 x/4 = 6
x = 5 * 3 -x = 6 *2 x = 6 * 4
x = 15 x = -12 x = 24
2º actividad:
a) 3x + 8 = -4 b) 2 - 3x = 14 c) 5x + 7 = 32
3x = -4 - 8 -3x = 14 - 2 5x = 32 - 7
3x = -12 -3x = 12 5x = 25
x = -12/3 x = -12/3 x = 25/5
x = -4 x = -4 x = 5
d) -4x - 2= -18 e) -2x - 7 = 1 f) 5x - 3 = 12
-4x = -18 + 2 -2x = 1 + 7 5x = 12 + 3
-4x = -16 -2x = 8 5x = 15
x = -16/-4 x = 8/-2 x = 15/5
x = 4 x = -4 x = 3
3º actividad:
a) 2x -3 = -x - 9 b) 3 = 5x - 12 c) -3x - 11 = x + 5
2x - 3 + x = -9 3 + 12 = 5x −11 = x + 5 + 3x
3x - 3= -9 15 = 5x −11 = 4x + 5
3x = -9 + 3 15/5 = x −11 − 5 = 4x
3x = -6 3 = x -16 = 4x
x = -6/3 -16/4 = x
x = -2 -4 = x
d) 8x - 30 = 2x - 6 e) 11x - 15 = 12 + 2x f) x + 13 = 43 - 14x
8x = 2x − 6 + 30 11x = 12 + 2x + 15 x = 43 − 14x − 13
8x = 2x + 24 11x = 2x + 27 x = −14x + 30
8x − 2x = 24 11x − 2x = 27 x + 14x = 30
6x = 24 9x = 27 15x = 30
x = 24/6 x = 27/9 x = 30/15
x = 4 x = 3 x = 2
espero q te ayude :D