Question 111384
Let x be gallons of fuel oil used in September,  x+12 oct, 2x nov
x+x+12+2x=132
4x+12=132
4x+12-12=132-12
4x=120
4x/4=120/4
x=30 gal sept
30+12=42 gal oct
2*30=60 gal nov
Always check
30+42+60=132
Ed