Solve the system by substitution. 5x - 4y = 15 3-2y = -x Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The system has a single solution. The solution set is (Simplify your answer. Type an ordered pair.) OB. There are infinitely many solutions and the equations are dependent. The solution set is {(x,y)|5x - 4y= 15 OC. The system is inconsistent. The solution set is the empty set. 4

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