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with explanation, please

With Explanation Please class=

Sagot :

Answer:

44

Step-by-step explanation:

(7^-1 - 8^-1)^-1 - (3^-1 - 4^-1)^-1

( 1/7 - 1/8 )^-1 -( 1/3 - 1/4)^-1

( 1/56)^-1 -( 1/12)^-1

56 -12

44