Question 838986
v = amount of liters to drain and replace


{{{(8*25-25v+100v)}}} represents the amount of antifreeze material resulting in the radiator.  A factorization will be useful:  {{{200+(100-25)v}}}.


{{{(200+(100-25)v)/8=45}}}

{{{highlight((200+75v)/8=45)}}}
Solve for v.
-
{{{200+75v=360}}}
{{{75v=160}}}
{{{v=2.133333}}}... liters to remove and replace
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About 2 liters 130 mililiters
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