Respuesta :

Answer:

a= 90.65

Step-by-step explanation:

4a+17.5+2.2-18.8-3.5=360

4a-2.6=360

4a=362.6

4a/4=362.6/4

a=90.65

Answer: a=21

Step-by-step explanation:

a - 3.5 = 17.5

a = 17.5 + 3.5 = 21