Question 1055108
	
The cooling system of a car has a capacity of 15 liters. If the system is currently filled with a mixture that is 20​% ​antifreeze, how much of this mixture should be drained and replaced with pure antifreeze so that the system is filled with a solution that is 50% ​antifreeze?
<pre>The equation you need is a simple one.

Let the amount to be drained and replaced by 100% antifreeze be D
We then get the following equation: {{{highlight_green(highlight(.2(15 - D) + D = .5(15)))}}}
Solve for D, the amount to be drained and replaced.
It's that simple...nothing complex!!