tolong jawab pakai cara nmr 13,14,18,19

13.)
4X - 2 + 2X - 1 + X + 5 < 58
7X + 2 < 58
7X < 56
X < 8 (b)

14.)
168 = p + p - 36
204 = 2p
p = 102 cm (b)

18.)
% tara = tara / bruto × 100
3 = tara / 110 × 100
tara = 3,3

netto = bruto - tara = 110 - 3,3 = 106,7
netto 10 karung = 106,7 × 10 = 1067 kg (b)