Question

Rezolvati, in multimea numerelor naturale,inecuatiile:
a) 2x+3≤x+17
b)3x-12>2x+13
c)5(x+1)+2 d)2x+3+3x+4>4x+8
e)7(2x-1)≤49
f)6(2x+3)-4≤38

Answer 1

a) x-2x<17-3
x=14 s{1,2,3..13,14}
b) -2x+3x>13+12
x>25 S{ 26;27;28..}
c) nu mai aveai de completat ceva?
d) -4x+2x+3x>8-3-4
x>1
s{2.3.4...}
e) 14x-7< 49
14x< 49+7
14x<56
x< 4
s{0,1,..4}