Question

7 + 13а – 3- 20 + 2а

Answer 1

7 + 13а – 3- 20 + 2а

combine like terms

7+13a+2a-3-20

7+15a-3-20

then do -3-20

-3-20=-23

7+15a-23

7-23=-16

15a-16

answer:

15a-16 or -16+15a