kimia : biologi = x : 5
kimia = 30 mg
vitamin = 105 mg
kimia = x/(x + 5) × 105
30 = x/(x + 5) × 105
30 = (105x)/(x + 5)
30 × (x + 5) = 105x
30x + 150 = 105x
105x – 30x = 150
75x = 150
x = 150/75
x = 2
kimia : biologi = x : 5
kimia = 30 mg
vitamin = 105 mg
kimia = x/(x + 5) × 105
30 = x/(x + 5) × 105
30 = (105x)/(x + 5)
30 × (x + 5) = 105x
30x + 150 = 105x
105x – 30x = 150
75x = 150
x = 150/75
x = 2