1.

If a : b = 20:5 then find out the value of (13a-9b): (11a-7b)?

A. $$ {43 over 37}$$
B. $$ {43 over 42}$$
C. $$ {44 over 37}$$
D. $$ {40 over 33}$$
Answer» B. $$ {43 over 42}$$


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