Respuesta :

Answer:

1. 47/20

2. 27

3. -49/5

Step-by-step explanation:

1. You need to isolate x by adding 3/4 to 2 4/5

2. You need to isolate x so add 11 to -20 and then divide that answer by -1/3

3. Add 12 to -19 then divide that answer by 5/7