Chemistry Equation! Help is much appreciated!

Question

Please answer these equations and show how you got the answer! Thanks!

1. (209.6J/K) = [2mol(213.74 J/molK) + 6mol(S (188.825 J/molK)] – [1mol(219.56 J/molK) + 3mol(x)]

2. ?Grxn = [12mol(-394.359 kJ/mol) + 6mol(-228.572 kJ/mol)] – [2mol(124.5 kJ/mol) + 15mol(0 kJ/mo)]

Answer 1

1). 209.6 = 2x213.74 + 6x188.825 - 1x219.56 + 3x

209.6 = 427.48 + 1132.95 - 219.56 + 3x

209.6 = 1340.87 + 3x

3x = -1131.27

x = -377.09 J/K

2). Grxn = 12x-394.359 + 6x-228.572 - 2x124.5 + 15x0

Grxn = -4732.308 + (-1371.432) - (249) + 0

Grxn = -6352.74 kJ/mol