SOLUTION: how many gallons of a 60% antifreeze solution must be mixed with 70 gallons of 30% antifreeze to get a mixture that is 50% antifreeze?
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Question 432753: how many gallons of a 60% antifreeze solution must be mixed with 70 gallons of 30% antifreeze to get a mixture that is 50% antifreeze?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
.60x+.30x70=.5(x+70)
.6x+21=.5x+35
.1x=14
x=14/.1=140
You need 140 gallons..
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