Tolong dijawab dengan menggunakan caranya agar dapat dimengerti,thx:)

Dik:
q1 = 3 mikroC = 3 × 10^-6 C
r = 6 cm = 6 × 10^-2 m
F = 45 N
k = 9 × 10^9

Dik: q2

Jawab:
F = k . q1. q2 / r^2
45 = 9 × 10^9 . 3 × 10^-6 . q2 / (6×10^-2)^2
45 = 27 ×10^3 . q2 / 36 × 10^-4
q2 = 45 × 36 × 10^-4 / 27 × 10^3
q2 = 60 × 10^-4 × 10^-3
q2 = 60 × 10^-7
q2 = 6 × 10^-6 Coulomb
q2 = 6 mikroCoulomb