Question 499001
tank 1 = x
tank 2 = y
x+y=54
y=9+2x
x+9+2x=54
3x=54-9
3x=45
x=45/3
x=15
substituting x to find y
y=9+2x
y=9+2*15
y=9+30
y=39
one tank holds 15 gallons and the other tank holds 39 gallons