Justify each step in solving the equation 4 + 1 = 7( − 3)+ 1 by writing a reason for each statement.
Statement Reason
4 + 1 = 7( −3) +1
4x=7(x-3)
4x=7x-21
-3x=-21
X=7

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Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.