Answer:
equation=r+b=10
answer=10-r
Its common sense y'all! IF you don't have enough information,just make up a equation! And use the variables as your numbers!
There are 10 - r blue marbles
The distribution of the marbles are given as:
Red = r
Blue = b
Total = 10
This means that:
b + r = 10
Solve for b
b = 10 - r
Hence, there are 10 - r blue marbles
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