Respuesta :

Answer:

13a-9b

Step-by-step explanation:

you add 10a and 3a which = 13a

you add 4b and -15b which is -9b

Answer:

There are 2 sets of like terms: 10a and 3a, then 4b and 15b


Hope this helps Buddy!

Please mark as brainliest!


~Courtney