According to the meaning, the equation 0.3x+0.4y+1/70 (100-x-y) =10.

2. 1/7x+2.8/7y+ 10/7-0. 1/7x-0. 1/7y = 10

2/7x+2.7/7y=60/7

2x+2.7y=60

20x+27y=600

Y must be a multiple of 20 to make x an integer.

So y=20 x=3 100-x-y=77.

Answer 20 packets of rapeseed, 3 packets of tomato seeds and 77 packets of radish seeds.

I typed this hard. If there are any mistakes, please adopt them and make some modifications.