Упростите выражение 3 7/12a-a+3/4a

3 7/12а-а+3/4а=2 7/12а+9/12а=2 16/12а=3 4/12а=3 1/3а 1) 3 7/12а-а=2 7/12а 2) 2 7/12а+3/4а=2 7/12а+9/12а=2 16/12а=3 4/12а=3 1/3а

= 2 7/12a + 3/4a = 2 7/12a + 9/12a = 3 4/12a = 3 1/3a