Question

you and a friend join a gym the registration fee is $30 and the monthly membership is $20 if the total bill for you and your friend is $420 how many months did you pay for

Answer 1

if you total is 420 and registration is 30 for you and your friend registration would be 60 so subtract 420 by 60
$420 - 60 = 360$
since the monthly fee is 20 divide 360 by 20
$360 \div 20 = 18$
So both people payed for 18 months. Which is a little over a year.

Hope this helped!