Question 745776
H=30%
B=8 liters
T=5%
w= unknown liters to add to make T concentration


(Intended component)/(amount of mixture)=resulting concentration
{{{H*B/(B+w)=T}}}
{{{H*B=T(B+w)}}}
{{{H*B=B*T+Tw}}}
{{{H*B-T*B=Tw}}}
{{{highlight(w=B*(H-T)/T)}}}