Question

efetue 15a + 10 - 3a

Answer 1

15a+10 - 3a
3a- 15a = -10
-12a= -10 . (-1)
12a= 10
a= 10/12
a= 5/6

Answer 2

12a+10

12a= -10

a= -10/12

a= -5/6