Solve for c.
3abc + b = 5
c = (5 - b)/(3ab)
c = -5/3ab
c = 2 - ab

The answer to your question is: the first option

Step-by-step explanation:

          Equation                     3abc + b = 5                 solve for c

                                              3abc = 5 - b                  pass b subtracting

                                              3ac = (5 - b)/b              pass b dividing

                                              3c  = (5 - b) / ab            pass a dividing

                                              c = (5 - b) / 3ab            pass 3 dividing

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step-by-step explanation: