Let's call Margaret's age "M" and her aunt's age "A".
From the first sentence, we know that:
M = A - 32
From the second sentence, we know that:
3(M + 13) = 2A - 1
Substituting the first equation into the second equation gives:
3(A - 32 + 13) = 2A - 1
Simplifying gives:
3A - 57 = 2A - 1
Subtracting 2A and adding 57 to both sides gives:
A = 56
So Margaret's aunt is 56 years old.