Answer:
Equation: 0.165 x = 69.3
x = 420 gallons
Explanation:
Let us call x the total number of gallons the family uses. then we know that 16.5 % (WHICH WE ARE TOLD IS 69. 3 GALLONS ) of it used for cooking, meaning
Dividing both sides by 0.165 gives
Hence, 420 gallons of water are used each day by a family.