On the 4

On the way to play disc golf with his two boys, Mr. Smith purchases three muffins and two water bottles, totaling $9.75. The following week he only had Asher with him, so he bought two muffins and one bottle of water totaling $6.00.
What is the cost of one muffing? What is the cost of one bottle of water?

Correct answer:

m =  2.25
w =  1.5

Step-by-step explanation:


3m+2w = 9.75
2m + 1w = 6.00

3·m+2·w = 9.75
2·m + 1·w = 6.00

3m+2w = 9.75
2m+w = 6

Row 2 - 2/3 · Row 1 → Row 2
3m+2w = 9.75
-0.33w = -0.5


w = -0.5/-0.33333333 = 1.5
m = 9.75-2w/3 = 9.75-2 · 1.5/3 = 2.25

m = 9/4 = 2.25
w = 3/2 = 1.5

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