SOLUTION: Billy is saving up to buy a new cell phone. He has $45 right now, and can save $6 each month. If billy wants to buy a phone that costs $63, how many months does he have to save up?

Algebra ->  Human-and-algebraic-language -> SOLUTION: Billy is saving up to buy a new cell phone. He has $45 right now, and can save $6 each month. If billy wants to buy a phone that costs $63, how many months does he have to save up?      Log On


   

Question 638597: Billy is saving up to buy a new cell phone. He has $45 right now, and can save $6 each month. If billy wants to buy a phone that costs $63, how many months does he have to save up?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +n+ = number of months needed
+45+%2B+6n+=+63+
Subtract +45+ from both sides
+6n+=+18+
+n+=+3+
It takes him 3 months to save $63