Răspuns :
2(x+1)-4<6
2(x+1)-4+4<6+4
2(x+1)<10
2(x+1)/2<10/2
x+1<5
x + 1 - 1< 5 - 1
x < 4
x ∈ (-∞, 4)
2(x+1)-4+4<6+4
2(x+1)<10
2(x+1)/2<10/2
x+1<5
x + 1 - 1< 5 - 1
x < 4
x ∈ (-∞, 4)