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Răspuns:

{25-[(x-2016)x2-2]X2}:3-3=0

{25-[(x-2016)x2-2]X2}:3=0+3

{25-[(x-2016)x2-2]X2}:3=3

{25-[(x-2016)x2-2]X2}=3x3

25-[(x-2016)x2-2]X2=9

[(x-2016)x2-2]X2=25-9

[(x-2016)x2-2]X2=16

[(x-2016)x2-2]=16:2

(x-2016)x2-2=8

(x-2016)X2=8+2

(x-2016)X2=10

(x-2016)=10:2

x-2016=5

x=5+2016

x=2021

[tex]\frac{25-[(x-2016)2-2]2}{3}-3=0 => \frac{25-[(2x-4032-2)2]}{3}-3=0 => \frac{25-[(4x-8068)]}{3}-3\\\\=0 => \frac{(25-4x+8068)}{3}-3=0 =>[/tex]

[tex]\frac{-4x+8093}{3}-3=0 => \frac{-4x+8093}{3}=3 => -4x+8093=9 => \\\\-4x=-8084 |(-1) => 4x=8084 => x=2021[/tex]