A flat-screen TV weighs 147 newtons. The mass of the TV is kilograms.

147N / (9.81m/s^2) = 14.9847kg

(147kgm/s^2) / (9.81m/s^2) = 14.9847kg

Wherever the TV happens to be, its weight is

(mass) · (acceleration of gravity in that place).

There are small differences, but the acceleration of gravity anywhere on Earth is always close to 9.8 m/s². So if the TV is anywhere on Earth, we can write

147 N = (mass) · (9.8 m/s²)

Divide each side

by 9.8 m/s² : Mass = (147 N) / (9.8 m/s²)

= (147/9.8) kg

= 15 kg.