Question 1047711
What is the "six step method"?


y, a variable for how many gallons of the 70% antifreeze to add.


{{{pureAntifreeze/mixtureQuantity=concentrationWanted}}}


{{{(70y+15*80)/(y+80)=60}}}-------the key equation to solve


{{{(7y+15*8)/(y+80)=6}}}


{{{7y+15*8=6y+480}}}


{{{y=480-15*8}}}


{{{y=360}}}