Fill in your remaining amount (110) in a because a is your remaining amount.
Solve for w(weeks):
110=1550-90w Subtract 1550 on both sides of the equal sign to get:
-1440=-90w Now do the inverse operation and divide -90 on both sides to get:
16= w
So the answer is 16 weeks
Marissa has made withdrawals for 16 weeks when the amount remaining in her account is $110. This can be determined by substituting 110 into the provided equation and solving for w .
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