Question

Cell phone plan A costs $70 per month and comes with a free $500 phone. Cell phone plan B costs $50 per month but does not come with a phone. If you buy the $500 phone and choose plan B, how many months is it until your cost is the same as plan A’s?

Answer 1

Answer:25 months

Step-by-step explanation: Let's make the equations first,

Plan A: 70x   Plan B: 50x+500

Now we make it into an equivalent equation:

70x=50x+500

Then we solve:

70x=50x+500

-50x -50x

20x=500

÷20 ÷20

x=25

To check if it's correct, we just plug it in:

70(25)=50(25)+500

1750=1750