Find the heat capacity of a metal: Help!?

Question

Calculate the specific heat of a metal. in J/kg.K, from the following data. A container made of the metal has a mass of 3.6 kg and contains 15.0 kg of water, a 1.8 kg of The metal initially at temperature of 187.0°C is dropped into the water. the container and the water have a initial temperature of 16.0°C and the final temperature of the entire system is 18.0°C.

Answer 1

if you consider the drop in heat in the metal as raising the heat in the water and container, then
the metal gives up
1.8kg x 169 deg (change) x specific heat
equals the increase in water
15 x 2 x 1 (spec heat of water)
plus the container
3.6 x 2 x spec heat
so
1.8 x 169 x S = 15 x 2 + 3.6 x 2 x S.

solve for S