Answer:
b is the answer .
Step-by-step explanation:
a + b -b = a
a + b - b =a
a+b-b = a
because
As a normal step,
b-b =0
a + 0 =a
I AM NOT THAT GOOD AT EXPLAINING, SORRY BUT IF YOU NEED MORE EXPLANATION, I'D BE READY TO HELP.
Aliyyah
