Question

Se considera multimea M={x€Q|1/3<_x<4}. Rezolvati in multimea M ecuatiile:
a) 6x + 2 = 5x +3
b) 3(x + 1/2) + 4x =7x + 1 intreg si 1/2
c) x: 2/3 -1/5 =7,3

Answer 1

a) 6x -5x =3-2
x=1

b) 3x+3/2 +4x = 7x+3/2
7x=7x
x ∈ M

c) 3x/2 = 73/10 + 2/10
3x/2= 75/10
30x = 150
x=150:3
x=50
x∈∅