Mr. andi has 1900 ducks and chickens in the farm altogether. 2/5 of the number of chickens is equal to 1/7 of the number of ducks. the difference between the number o ducks and chickens in the farm is.....

Question

stamp · Answer

1900 = d + c

2/5 c = 1/7 d

c = 5/2 (1/7 d)

c = 5/14 d

Substitute.

1900 = d + ( 5/14 d )

Simplify.

1900 = 19/14 d

Solve.

14/19 ( 1900 ) = d

1400 = d

Find c.

1900 = c + d

1900 = c + ( 1400 )

c = 500

Check.

2/5 c = 1/7 d

2/5 ( 500 ) = 1/7 ( 1400 )

200 = 200