Alec D. answered 05/14/19
Astronomy and Astrophysics undergraduate senior
I may not be interpreting your question correctly, but I believe you're saying (with x as the first number and y as the second) that
x = y - 3
2y = 4x - 2
Solving this system of equations can be done through substitution, plugging in x = y - 3 to the second equation. This results in
2y = 4y - 12 - 2
Solving this results in y = 7
Plugging in y = 7 into x = y - 3, gives x = 7 - 3,
so x = 4