Question

n October, Greg and Thomas had the same amount of money in their savings accounts. In November, Greg deposited $120 into his account. Thomas increased the money in his account by 20%. When they compared their balances, they found that they were still equal. How much money did each person have in his account in October?

Answer 1

Each person had 600 dollars in their account. 

Answer 2

x + 120 = x(1.20)
x + 120 = 1.20x
120 = 1.20x - x
120 = 0.20x
120/0.20 = x
600 = x <=== what they had in Oct.
** they both had 720 in Nov