SOLUTION: How many gallons of 50% antifreeze solution must be mixed with 100 gallons of 30% antifreeze to get a mixture that is 40% antifreeze?
Algebra.Com
Question 466907: How many gallons of 50% antifreeze solution must be mixed with 100 gallons of 30% antifreeze to get a mixture that is 40% antifreeze?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How many gallons of 50% antifreeze solution must be mixed with 100 gallons of 30% antifreeze to get a mixture that is 40% antifreeze?
-----------------------
Equation:
alcohol + alcohol = alcohol
0.50x + 0.30*100 = 0.40(x+100)
---
Multiply thru by 100 to get:
50x + 30*100 = 40x + 40*100
10x = 10*100
x = 100 gallons (amt. of 50% solution needed)
================================================
Cheers,
Stan H
=============
RELATED QUESTIONS
How many gallons of a 50% antifreeze solution must be mixed with 100 gallons of a 30%... (answered by checkley79)
How many gallons of a 60% antifreeze solution must be mixed with 100 gallons of 15%... (answered by stanbon)
how many gallons of 60% antifreeze solution must be mixed with 100 gallons of 10%... (answered by jorel1380)
how many gallons of a 50% antifreeze solution must be mixed with 90 gallons of 15%... (answered by Marth)
how many gallons of a 50% antifreeze solution must be mixed with 60 gallons of 20%... (answered by mananth)
how many gallons of a 50% antifreeze solution must be mixed with 60 gallons of 25%... (answered by mananth)
How many gallons of a 50% antifreeze solution must be mixed with 70 gallons of 10%... (answered by stanbon,Alan3354)
how many gallons of a 70% antifreeze solution must be mixed with 100 gallons of 30%... (answered by Tatiana_Stebko)
How many gallons of 50% antifreeze solution must be mixed with 70 gallons of 25%... (answered by nerdybill)