Respuesta :

Cutiepatutie

Answer: 33a+19

Step-by-step explanation:

11a+7+10a+3+12a+9

Collect like terms.

(11a+10a+12a)+(7+3+9)

Simplify.

33a+19

urm0mskalesalad

Answer:

33a+9

Step-by-step explanation:

11a+10a+12a= 33a

7+3+9= 19