Question 1104058
x, amount of 50% alcohol
630-x, amount of 95% alcohol


{{{highlight_green(50x+95(630-x)=85*630)}}}

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{{{10x+19(630-x)=17*630}}}
{{{10x+19*630-19x=17*630}}}
{{{10x-19x=17*630-19*630}}}
{{{-9x=-2*630}}}
{{{x=2*630/9}}}

{{{x=140}}}
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{{{630-140=490}}}


140 mL of 50% and 490 mL of 95%