Question

I’M LOSING TIME!!!!!!

you are trying to decide which cell phone plan to purchase. Plan A chargeres $40 for a new phone and $20 a month for usage. Plan B provides the phone for free, but has a fee of $30 a month for usage.
Use the substitution method to determine when the two plans will cost the same.

Answer 1

At the 4 month, the cost will be the same

Explanation:

suppose x is the number of month.

Plan A= 40+20x

Plan B= 30x

Both plans cost the same;

40+20x =30 x

40=30x-20x

40/10=x

4=x

At the 4 month, the cost will be the same.