Question

ПОМОГИТЕ ПОЖАЛУЙСТА РЕШИТЬ
(12/27+2/9)-(11/21+1/7)

Answer 1

$( frac{12}{27} + frac{2}{9} )- (frac{11}{21} + frac{1}{7} )=( frac{12}{27} + frac{6}{27} )- (frac{11}{21} + frac{3}{21} )= frac{18}{27} - frac{14}{21} = frac{2}{3}- frac{2}{3} =0$