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[ 7/5 impartit 14/15 + 3/2 impartit ( 9/4 - 1 1/2) ] · 2/7 Va rog mult de tot!!

Răspuns :

9/4 - 11/2 = 9/4 - 22/4 = -13/4

[7/5 • 15/14 + 3/2 • (-4/13)] • 2/7 =

(3/2 - 6/13) • 2/7 =

(39-12)/26 • 2/7 =

27/26 • 2/7 =

27/91