Question

Cell phone company A charges $30 per month for service, plus a $100 insurance fee. Company B charges $50 per month with no additional fees. How many months of service does it take for these plans to cost the same amount?

Answer 1

Answer:

5

Step-by-step explanation:

The cost of company A is 30x + 100.  The cost of company B is 50x.  Set the two costs equal to each other and solve for x.

30x + 100 = 50x

Subtract 30x from both sides.

100 = 20x

Divide both sides by 20.

x = 5

At month 5, the prices will be equal.