SOLUTION: A class paid $20.00 for a cake and $4.00 per child for a slice of pizza. They paid $140.00. How many childen are in the class?

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Question 681657: A class paid $20.00 for a cake and $4.00 per child for a slice of pizza.
They paid $140.00.
How many childen are in the class?
Found 2 solutions by rfer, lynnlo:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(140-20)/4=30

Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
total amount============$140.00
1 cake==================20.00
==================================
$20.00 subtracted from $140.00=======$120.00
30 childrens times $4.00 per slice=$120.00
4divided 120=====30
30children in class