Let:
A be the number of pairs of Jeans Amina has.
I be the number of pairs of Jeans Idris has.
T be the total of pairs of Jeans.
Then,
A = 2
I = 3
Then, the equation that represents the total of pairs of jeans is:

Substituting the values we can find T:

Answer:
The equation is: T = A + I.
And the solution is T = 5.