Math
posted by Zoe .
A cup of coffee costs 80c less than a burger.Together they cost 220c.
Use this information to form an equation and solve it.
This question I can't get my head around.
It's due in 2 days but I would like to get it done sooner.
Thanks.

c + (c + 80) = 220
2c = 140
c = 70
Coffee costs 70 c
A burger costs 70 + 80 = 150 c