Gauss's Law
Gauss's Law is a general law applying to any closed surface that permits to calculate the field of an enclosed charge by mapping the field on a surface outside the charge distribution. The typical case, is a charge particle with spherical symmetry.
Electric flux = enclosed charge / permittivity
The equation is:
Φ =Q/ϵ
Where:
Φ: Electric flux
Q: Enclosed charge by the surface
ϵ: Permittivity
Let value of Φ be x ; ϵ be y