Question 49554
SEPT=X
OCT=X+12
NOV=2*X

THUS X+(X+12)+2*X=132 OR X+X+12+2X=132 OR 4X+12=132 4X=120 OR X=30 GAL.

THEREFORE THE SEPT USE=30 GAL. THE OCT. USE=30+12=42 GAL. & NOV. USE=2*30=60 GAL.

PROOF 30+42+60=132 OR 132=132