Answer:
Step-by-step explanation:
Let x be the number of boxes prepared by Sam
Jenna prepared x+40 boxes
Together they prepared x+x+40 = 430 boxes
2x = 390 boxes
x = 195 boxes
Sam prepared 195 boxes
Jenna prepared 195+40 = 235 boxes
So the answer is Sam: 195, Jenna: 235