We are working on equations with variables on both sides..
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Step-by-step explanation:
the equation will be
-4(7+n)=3n
let's solve the equation
-28-4n=3n
add 4n to the both sides
the equation becomes
-28-4n+4n=3n+4n
-28=7n
divide both sides by 7
-4=n
or
n=-4