Question

(29/42-a)-3/42=11/42

Answer 1

(29/42-а) - 3/42 = 11/42
(29/42-а)=3/42 + 11/42
(29/42-а)=1/3
42-а=29 : 1/3
42-а=87
а=42-87
а=-45

Answer 2

29/42-a=11/42+3/42
29/42-a=15/42
-a=15/42+29/42
a=-22/21

Answer 3

прошу прощения,вместо 3/42;13/42

Answer 4

Сама решила!!!29/42-a=13/42+11/42 29/42-a=24/42 a=29/42-24/42 a=5/42