Question

(3 целых девять 13 + y)-4 цэлых девять 13 =17 тренадцатых

Answer 1

( 3 9/13 + y ) - 4 9/13 = 17/13
3 9/13 + y = 17/13 + 4 9/13
3 9/13 + y = 1 4/13 + 4 9/13
y = 5 13/13 - 3 9/13
y = 2 4/13

Answer 2

спс