Question

resolva equacoes modulares |x+5|=3x+4

Answer 1

1) x+5 = 3x + 4
2) x+5 = - 3x - 4

 x+5 = 3x + 4
-3x + x = -5 + 4
-2x = -1
x = 1/2

 x+5 = - 3x - 4
3x + x = -5 - 4
4x = -9
x = -9/4

S: {1/2, -9/4}