2a+7a-7-31
3 18 6
2/3a+7/18a
=12a+7a
18
=19a
19a-7-31
18 6
19/18a-7-31/6
19/18a-73/6
Step-by-step explanation:
the answer is 19a-73
12/11c
or
12
c
11
â this is your sign