Answer: He should plant 50 tulip bulbs and 300 daffodil bulbs .
Explanation:
Let x be the number of tulip bulbs and y be the number of daffodil bulbs.
According to the given statement , we have

Substitute the value of y from (1) in (2) , we get


Divide both sides by 7 , we get
x= 50
Out value of x in (1) , we get

Hence, He should plant 50 tulip bulbs and 300 daffodil bulbs .