In 15/4 – 7x = 9, x= / » Mathematical Tools for Economics 1 solved MCQs / By admin Question: In 15/4 – 7x = 9, x= A. 4/3 B. ¾ C. -4/3 D. -3/4 Answer» d. -3/4 Note: The above multiple-choice question is for all general and Competitive Exams in India.