How many gallons of a 70% antifreeze solution must be mixed with 60 gallons of 25% antifreeze to get a mixture that is 60% antifreeze?
You need to add ___ gallons of 70% antifreeze solution
let x be the number of gallons of 70% antifreeze that needs to be added
given that x gallons of 70% anti freeze is added to 60 gallons of 25% anti freeze to get a mixture of 60% anti freeze.
210 gallons of 70% anti freeze must be mixed.