SOLUTION: roger wants to make a health drink with 4:1 ratio of water to lemon juice how many cups of lemon juice or water does he need if he wants to use 30 cups

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Question 198759: roger wants to make a health drink with 4:1 ratio of water to lemon juice how many cups of lemon juice or water does he need if he wants to use 30 cups
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let w= cups of water he uses
30+-+w= cups of lemon juice he uses
given:
w%2F%2830-w%29+=+4%2F1
Multiply both sides by 30+-+w
w+=+4%2A%2830+-+w%29
w+=+120+-+4w
5w+=+120
w+=+24
30+-+w+=+6
Roger needs 24 cups of water and 6 cups of lemon juice