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bleh. forgot to close my TeX.

\[ r_1 \text{ is the number of rooms on boat A, etc. }\]

b+15=a

from what i under stand:
A=?
B=15+A
C=2A-39

The last equation would be ?

A+B+C=388

sorry had to step away real quick

A+15+A+2A-39=388

Yep. Then solve for A.

Once you know A, you can go back to the equations for B and C to find what those are.

i got it from here thanks a lot!