Month f(x) = No. of imports g(x) = No. of exports
January (1) 3 3
February (2) 6 4
March (3) 9 5
April (4) 12 6

  x = 1

Step-by-step explanation:

If your "system of equations" is supposed to be ...

  f(x) = g(x)

the two function values are equal in January, for x = 1. The number of imports is equal to the number of exports in that month. Both f(x) and g(x) are 3 for x=1.

___

There are no "equations" involved here. There are only tables for f(x) and g(x). We assumed the relevant equation was f(x)=g(x), but that is not given as part of the problem statement.

If your "system of equations" is ...

then the solution is (x, y) = (1, 3) as described above.