For example, I have a system of equations, e.g.

$

begin {cases}

a_1 x + b_1 y + c_1 z = d_1, \

a_2 x + b_2 y + c_2 z = d_2, \

a_3 x + b_3 y + c_3 z = d_3,

end {cases}

$

and for that I have to find $ x / y $ in the edition. These are just example equations. The real equations may be bigger with more variables, but I need one $ x / y $ (Transfer function in the output).