Answer:

6

Step-by-step explanation:

14 farmers 9 days

21 farmers x days

14*9 = 21*x

x = 6 days

Verified answer

Answer:

let farmers be x

and wheat be 9y

Step-by-step explanation:

14x -9y=0 .......1

21x -9y =0 ........2

now using elimination method

21x-9y =0

14x-9y=0

_______

7x=0

_______

x =7

there fore the work will end in 7 days