SOLUTION: The cooling system in a truck contains of 4 gallon of coolant that is 30% antifreeze. How much must be withdrawn and replaced with 100% antifreeze to bring the coolant in the sys
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Question 775440: The cooling system in a truck contains of 4 gallon of coolant that is 30% antifreeze. How much must be withdrawn and replaced with 100% antifreeze to bring the coolant in the system to 50% antifreeze? Answer by sofiyac(983) (Show Source):
You can put this solution on YOUR website! let's say we need x gallons of 100% antifreeze so
4(30)-x(40)+x(100)=4(50)
120-40x+100x=200
60x=80 divide each side by 60
x=8/6=4/3 of a gallon or 1.33333 gallons
