Question

one satellite radio service charges $10 per month plus an activation fee of $20. A second service charges $11 per month plus an activation fee of $15. In what month was the cost of the service the same?......with steps please

Answer 1

To find this we should put this into an equation: 
10x + 20 = 11x + 15 
With x being number of months passed. 
First, we subtract 15 from both sides to get: 
10x + 5 = 11x 
Then subtract 10x from both sides to get: 
5 = x 
So the costs will be the same after 5 months, hope this helps!