Respuestas

2013-12-15T06:28:01+01:00
a) 3x + 2 = x - 6
3x - x = -6 - 2
2x = -8
x = -8/2
x = -4

b) -y - 1 = 5 + y
-1 - 5 = y + y
-6 = 2y
y = -6/2
y = -3

c) x + 8 + 3x - 3 = 2x - 3
4x + 5 = 2x - 3
4x - 2x = -3 - 5
2x = -8
x = -8/2
x = -4

d) 1 + x = 5 - x
x + x = 5 - 1
2x = 4
x = 4/2
x = 2

e) z - 2 = - 3z - 10
z + 3z = 2 - 10
4z = -8
z = -2

f)  = x
x + 8 = 2x
8 = 2x - x
x = 8