HEHE SORRY BUT PLEASE! the sum of A plus B equals 15. if B = 9, which equation can be used to find the value of A?

Answer:
A + 9 = 15
Step-by-step explanation:
given:
A + B = 15
if B is given 9, put it into the equation.
A + B = 15
A + 9 = 15
A = 15 - 9
A = 6