explaining the role of banks and solve bank account

label Mathematics
account_circle Unassigned
schedule 1 Day
account_balance_wallet $5

Manuel goes to the bank and deposits$50.The next day he deposit another $60. Two days later he withdraws $75.If Manuel now has $125 in his bank account, how much money did he start within his banking account 

May 25th, 2015

Let us suppose that his first investment in bank account is X;

So,

$125 =X + $50 + $60 - $75 

$125 = X + $110 - $75

$125 = X + $35

X = $125 - $35

X = $90

Best of luck

May 25th, 2015

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