Answer: 3g - 5 = 19 ; 8 pounds
Step-by-step explanation:
Given that :
Difference between weight of 3 gallons of a liquid and a brick that weighs 5 pounds = 19 pounds.
Mathematically,
Let one gallon of the liquid = g
Hence,
(3 × g) - 5pounds = 19 pounds
3g - 5 = 19
The weight of one gallon(g) of the liquid equals :
From the expression above :
3g - 5 = 19
3g = 19 + 5
3g = 24
Divide both sides by 3
3g/3 = 24 /3
g = 8 pounds
Hence, weight of 1 gallon of the liquid is 8 pounds.
