SOLUTION: I have tried to solve this percentage problem: The price if a magazine subscription rose 5% this year. If the subscription now cost $21.00, how much did it cost last year. I set up

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: I have tried to solve this percentage problem: The price if a magazine subscription rose 5% this year. If the subscription now cost $21.00, how much did it cost last year. I set up      Log On


   

Question 198955: I have tried to solve this percentage problem: The price if a magazine subscription rose 5% this year. If the subscription now cost $21.00, how much did it cost last year. I set up equation up like this:
x-0.5x= 21
I think that I suppose to add like terms but I am not sure.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Since "The price if a magazine subscription rose 5% this year" and "the subscription now cost $21.00", this means that x%2B0.05x=21


x%2B0.05x=21 Start with the given equation.


1.05x=21 Combine like terms.


x=21%2F1.05 Divide both sides by 1.05


x=20 Divide


So it cost $20 last year.