A freshwater tank holds 400 gallons and evaporates 2 gallons per week. A salt water tank holds 451 gallons and evaporates 5 gallons per week. In how many weeks will the two tanks hold the same amount?

I think its 17 weeks

Question

A freshwater tank holds 400 gallons and evaporates 2 gallons per week. A salt water tank holds 451 gallons and evaporates 5 gallons per week. In how many weeks will the two tanks hold the same amount?

I think its 17 weeks

anonymous · Answer

Let x be the number of weeks

400 - 2x = 451 -5x
x = 17

17 weeks

lilg132 · Answer

451 - 5x = 400 - 2x

451 - 400 = 5x - 2x

51 = 3x

17 = x