SOLUTION: suppose a video store charges non-members $4 to rent each video a store membership cost 21 dollars and pay only $2.50 each video for what number is the cost the same

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Question 909694: suppose a video store charges non-members $4 to rent each video a store membership cost 21 dollars and pay only $2.50 each video for what number is the cost the same
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
21 + 2.5x = 4x
Subtract 2.5x from each side
21 = 1.5x
Divide each side by 1.5
x = 14

Check:
Membership $21 + 14 videos at $2.50 each = 21 + 35 = $56
Non member rate 14 videos at $4 = $56