a + b = 306 -------> a = 306 - b
0.06a + 0.03b = 0.05(306)
Substitute!
0.06(306 - b) + 0.03b = 0.05(306)
18.36 - 0.06b + 0.03b = 15.3
0.03b = 3.06
b = 102
a = 306 - 102
a = 204
Amber M.
asked • 04/21/18help with percents?
A dairy needs 306 gallons of milk containing 5% butterfat. How many gallons each of milk containing 6% butterfat and milk containing 3% butterfat must be used to obtain the desired 306 gallons?
Follow
•
2
Add comment
More
Report
1 Expert Answer
Still looking for help? Get the right answer, fast.
Ask a question for free
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Find an Online Tutor Now
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
