Question 1208969
typical drain-and-replace example.
<a href="https://www.algebra.com/my/drain-and-replace-antifreeze.lesson?content_action=show_dev">https://www.algebra.com/my/drain-and-replace-antifreeze.lesson?content_action=show_dev</a>


v, amount volume to remove and to be replaced
Volume of total capacity for cooling system same before as after, 15 liters


{{{(15*(0.40)-0.4v+1.00v)/15=0.6}}}
Solve for v.


{{{(0.4)(15)+(1-0.4)v=0.6(15)}}}

{{{0.6v=(0.6)(15)-(0.4)(15)}}}

{{{0.6v=15(0.6-0.4)}}}

{{{v=15((0.6-0.4)/0.6)}}}

{{{15(1/3)}}}

{{{v=5}}}