Paula can't quite read the board in her math class. She writes down the equation she reads on the board as 2x - 7 = 23. She correctly answers the equation she wrote down, but is surprised to hear the teacher say that the answer is 5 less than the answer Paula found. When Paula asks the teacher to check her work, the teacher says that Paula copied the x coefficient incorrectly (but copied everything else correctly). What should the coefficient of x be?