Problem: If m/n=4/3 and r/t=9/14, the value of 4nt−7mr3mr−nt​ is:
Answer Choices:
A. −521​
B. −1411​
C. −141​
D. 1411​
E. −32​
Solution:
ntmr​=34​⋅149​=76​;∴mr=6k and nt=7k.
∴4nt−7mr3mr−nt​=28k−42k18k−7k​=−14k11k​=−1411​.