SOLUTION: How many gallons of a 70% antifreeze solution must be mixed with 70 gallons of 25% antifreeze to get a mixture that is 60% antifreeze?
x= 70% antifreeze
x+70= 25%antifreeze
Algebra.Com
Question 708649: How many gallons of a 70% antifreeze solution must be mixed with 70 gallons of 25% antifreeze to get a mixture that is 60% antifreeze?
x= 70% antifreeze
x+70= 25%antifreeze
x+.60(x+70)=unknown this is were I am lost
x+.60x+42
1.6x+42
Answer by josgarithmetic(39799) (Show Source): You can put this solution on YOUR website!
Taking the format of quantity*concentration,
= actual antifreeze substance
, the desired concentration is 60%. Volume V is still unknown.
Known also is that this starts with 70 gallons of one of the antifreeze solutions, so,
x+70=V, which we might have used already in setting up the "60%" equation.
Let's do that, already:
THAT is what we want to solve; solve for x.
RELATED QUESTIONS
How many gallons of a 70% antifreeze solution must be mixed with 80 gallons of 25%... (answered by jorel1380)
How many gallons of a 80% antifreeze solution must be mixed with 80 gallons of 25%... (answered by checkley79)
How many gallons of a 60% antifreeze solution must be mixed with 70 gallons of 25
%... (answered by josgarithmetic)
How many gallons of 70% antifreeze solution must be mixed with 90 gallons of 25%... (answered by oberobic)
How many gallons of 50% antifreeze solution must be mixed with 70 gallons of 25%... (answered by nerdybill)
How many gallons of 80% antifreeze solution must be mixed with 90 gallons of 25%... (answered by Fombitz)
How many gallons of a 70% antifreeze solution must be mixed with 90 gallons of 25%... (answered by richwmiller)
How many gallons of a 70% antifreeze solution must be mixed with 70 gallons of 10%... (answered by stanbon)
How many gallons of a 70% antifreeze solution must be mixed with 70 gallons of 10%... (answered by solver91311)
How many gallons of a 80% antifreeze solution must be mixed with 70 gallons of
30%... (answered by Edwin McCravy,greenestamps)