SOLUTION: I bought 2 donuts and 3 lattes yesterday for $6.15, today I bought 3donuts and 4 lattes for $8.35, how much are donuts and how much are lattes? I got latte would be 1.75 donuts .
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Question 53809: I bought 2 donuts and 3 lattes yesterday for $6.15, today I bought 3donuts and 4 lattes for $8.35, how much are donuts and how much are lattes? I got latte would be 1.75 donuts .45 am i right? Answer by checkley71(8403) (Show Source):
You can put this solution on YOUR website! 2D+3L=6.15 & 3D+4L=8.35 MULTIPLYING EQ #1 BY 3 & MULT EQ #2 BY -2 WE GET
6D+9L=18.45
-6D-8L=-16.70 NOW ADDING THESE TWO EQUATIONS WE GET
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0D+L=1.75 OR THE PRICE OF A LATTE IS 1.75 & THE PRICE OF THE DONUT IS
2D+3*1.75=6.15 OR 2D=6.15-5.25 OR 2D=.90 OR D=.90/2 OR D=.45 THE PRICE OF A DONUT
PROOF 3*.45+4*1.75=8.35 OR 1.35+7.00=8.35 OR 8.35=8.35
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