SOLUTION: How many gallons of a 70% antifreeze solution must be mixed with 70 gallons of 10% antifreeze to get a mixture that is 60% antifreeze?
Algebra.Com
Question 981339: How many gallons of a 70% antifreeze solution must be mixed with 70 gallons of 10% antifreeze to get a mixture that is 60% antifreeze?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
I you have 
gallons of 70% solution, then 
gallons is pure stuff. If you have 70 gallons of 10% solution, then 
gallons of pure stuff. If you mix gallons with 
gallons, you have 
gallons, and 60% of this, or )
is pure stuff. The amount of pure stuff has to equal the amount of pure stuff, so:
)
Just solve for .
John
My calculator said it, I believe it, that settles it
RELATED QUESTIONS
How many gallons of a 70% antifreeze solution must be mixed with 70 gallons of 10%... (answered by stanbon)
how many gallons of a 80% antifreeze solution must be mixed with 100 gallons of 10%... (answered by stanbon)
How many gallons of a 50% antifreeze solution must be mixed with 70 gallons of 10%... (answered by stanbon,Alan3354)
how many gallons of 70% antifreeze solution must be mixed with 60 gallons of 10%... (answered by checkley77)
How many gallons of 80% antifreeze solution must be mixed with 100 gallons of 10%... (answered by jorel1380)
how many gallons of an 80% antifreeze solution must be mixed with 100 gallons of 10%... (answered by nerdybill)
How many gallons of a 80% antifreeze solution must be mixed with 70 gallons of
30%... (answered by Edwin McCravy,greenestamps)
how many gallons of a 70% antifreeze solution must be mixed with 100 gallons of 30%... (answered by Tatiana_Stebko)
how many gallons of a 60% antifreeze solution must be mixed with 70 gallons of 30%... (answered by jorel1380)