Question 1189919
Dilution - just adding water


{{{(85*v)/180=30}}}


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{{{85v=180*30}}}

{{{v=(180*30)/85}}}

{{{v=63.53}}}--------------antifreeze

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{{{116.47}}}-------------of water



quick check
{{{(85*63.5)/(116.5+63.5)=30}}}