SOLUTION: Tanisha and Rachel had lunch at the mall. Tanisha ordered three slices of pizza and two colas.Rachel ordered two slices of pizza and three colas.Tanisha's bill was $6.00, and Rache
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Question 719846: Tanisha and Rachel had lunch at the mall. Tanisha ordered three slices of pizza and two colas.Rachel ordered two slices of pizza and three colas.Tanisha's bill was $6.00, and Rachel's bill was $5.25. What was the price of one slice of pizza? What was the price of one cola? Show your steps.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the price in dollars of a slice of pizza
Let = the price in dollars of a cola
given:
Tanisha's bill:
(1)
Rachel's bill:
(2)
---------------------
Multiply both sides of (1) by
Multiply both sides of (2) by
Subtract (2) from (1)
(1)
(2)
Plug this result back into (1) or (2)
(1)
(1)
(1)
(1)
$1.50 = the price of a slice of pizza
$.75 = the price of a cola
check:
(1)
(1)
(1)
(1)
OK
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