When do two plans cost the same?
Write each plan as an equation and set the costs equal. Solve for the number of months.
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Plan A has a joining fee of 50 dollars plus 2 dollars per month. Plan B has a joining fee of 39 dollars plus 3 dollars per month. After how many months do the two plans cost the same?
Answer: 11
Plan A has a joining fee of 27 dollars plus 2 dollars per month. Plan B has a joining fee of 21 dollars plus 5 dollars per month. After how many months do the two plans cost the same?
Answer: 2
Plan A has a joining fee of 48 dollars plus 7 dollars per month. Plan B has a joining fee of 103 dollars plus 2 dollars per month. After how many months do the two plans cost the same?
Answer: 11
Tip: Write each plan as an equation and set the costs equal. Solve for the number of months.
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