Question 116829
Sept{{{f}}}
Oct{{{f + 12}}}
Nov{{{2f}}}
Fuel used for the 3 months
{{{f + f + 12 + 2f}}}
{{{f + f + 12 + 2f = 132}}}gal
{{{4f + 12 = 132}}}
{{{4f = 120}}}
{{{f = 30}}} gal
Sept{{{30}}}
Oct{{{42}}}
Nov{{{60}}}
check answer
Does 30 + 42 + 60 = 132? yes
OK