Question

Given a= 12/7, b=1/4, c=1/9 and d=-5/4. Evaluate a(b-c)÷d. Write the answer only. (3
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Answer 1

Answer:

12/7(1/4-1/9)÷-5/4

12/7(9-4/36)÷-5/4

12/7×5/36÷-5/4

5/21÷-5/4

5/21×4/5

-4/21