Charla and David are observing the leaf growth rates of their plants. Charla’s plant starts on day 1 with 43 leaves and gets 1 new leaf a day. David’s plant starts on day 1 with 27 leaves and gets 5 leaves a day.
How many days will it take David’s plant to have as many leaves as Charla’s plant?
A. 7

B. 4

C. 9

D. 8

Question

Charla and David are observing the leaf growth rates of their plants. Charla’s plant starts on day 1 with 43 leaves and gets 1 new leaf a day. David’s plant starts on day 1 with 27 leaves and gets 5 leaves a day.
How many days will it take David’s plant to have as many leaves as Charla’s plant? 
A. 7

B. 4

C. 9

D. 8

anonymous · Answer

4

anonymous · Answer

let x be number of days
we have
43 + 1x = y
27 + 5x = y   where y is day when they are equal
subtract 
4x - 16 = 0
x = 4