Question

Add a+b-1,b-a+ 1,1-2b
1)1
2)-1
3)2
4)-2
please answer me it's urgent ​please explain

Answer 1

Answer:

1

Step-by-step explanation:

a+b-1+b-a+1+1-2b

a-a+b+b-2b-1+1+1

1