Question

Suppose that the water level of a river is 34 feet and that it is receding at a rate of
0.5 foot per day. Write an equation for the water level, L, after d days. In how many
days will the water level be 26 feet?

Answer 1

each day, the water decreases 0.5, so we can represent this decrease as 0.5*d
subtract this from the starting amount (34) and set the total equal to L, the water level

once you have your equation, plug in L = 26 and solve for d to get the days when the water level is at 26 feet