21/20-3/8-1/5= 13/15-(1/5+1/6)= СРОЧНО

Question

21/20-3/8-1/5=
13/15-(1/5+1/6)=
СРОЧНО

Answer 1

21/20 - 3/8 - 1/5 = 42/40 - 15/40 - 8/40 = 19/40 13/15 - (1/5 + 1/6) = 26/30 - (6/30 + 5/30) = 26/30 - 11/30 = 15/30 = 1/2