What is the mathematical equivalent to the equation x = -b + 4a * (c/12)?
1) c = 12 / (x + b)
2) c = 12 / (x + b - 4a)
3) c = 12 * [(x + b) * 4a]
4) c = 12 * [(x + b)/ 4a]
5) c = 12 * [(x / 4a) + b]