9514 1404 393
Answer:
321.25 kg
Explanation:
The given relations are ...
b = 2s
4b +4s = 771
Substituting for b, we have ...
4(2s) +4s = 771
12s = 771
s = 64.25
b = 2s = 128.50
Then the weight of interest is ...
b +3s = 128.50 +3(64.25) = 321.25 . . . . kg