Răspuns :
a) 12<=4x-4<=28 | +4
16<=4x<=32 |/4
4<=x<=8 => x apartine [4, 8]
b) 7<=3x-200<=13 |+200
207<=3x<=213 |/3
69<=x<=71 => x apartine [69, 71]
16<=4x<=32 |/4
4<=x<=8 => x apartine [4, 8]
b) 7<=3x-200<=13 |+200
207<=3x<=213 |/3
69<=x<=71 => x apartine [69, 71]