[3 / (x - 2)] + [7 / (x + 2)] = [7x / (x^2 - 4]
[3 / (x - 2)] + [7 / (x + 2)] = [7x / (x + 2)(x - 2)]
[3(x + 2) / (x + 2)(x - 2)] + [7(x - 2) / (x + 2)(x - 2)] = [7x / (x + 2)(x - 2)]
3(x + 2) + 7(x - 2) = 7x
3x + 6 + 7x - 14 = 7x
10x - 8 = 7x
10x - 7x = 8
3x = 8
x = 8 / 3