Question 1165238
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How many gallons of a 60% antifreeze solution must be mixed with 70 gallons of 25
​% antifreeze to get a mixture that is 50% antifreeze?
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How many gallons, v of a H% antifreeze solution must be mixed with G gallons of L​% antifreeze to get a mixture that is T% antifreeze?
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{{{Hv+LG=T(v+G)}}}
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{{{Hv+LG=Tv+TG}}}
{{{Hv-Tv=TG-LG}}}
{{{(H-T)v=G(T-L)}}}

{{{highlight(v=G((T-L)/(H-T)))}}}
substitute your given values and evaluate v.