SOLUTION: Resturant bill including 20% tip is $180.00, what was the bill before the tip? I don't know how to setup the problem to solve

SOLUTION: Resturant bill including 20% tip is $180.00, what was the bill before the tip? I don't know how to setup the problem to solve

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Question 499209: Resturant bill including 20% tip is $180.00, what was the bill before the tip? I don't know how to setup the problem to solve
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
Resturant bill including 20% tip is $180.00, what was the bill before the tip?
.
Let x = amount ($) before tip
then
x + .20x = 180
x(1+.20) = 180
x(1.2) = 180
x = 180/1.2
x = $150
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