Question

Solve the equation mx+n=0 ,where m and n are rationals and m is not equal to 0.

Answer 1

$mx + n = 0 \\ mx = - n \\ x = - \frac{n}{m}$
please follow me

Answer 2

let x =-n/m
given equation=mx+n=0
so,m*-n/m=0
-n+n=0
0=0