ONLY BIG BRAIN FLOOR GANG CAN SOLVE THIS At their going-out-of-business sale, Bill's Bikes sold 39 bikes and had 55 left. Which equation could be used to find x, the number of bikes the store had originally?
A.
x - 55 = 39
B.
x + 39 = 55
C.
x - 39 = -55
D.
x + 55 = -39