( 7 x X - 11 ) 3 = 25 x 52 + 200
=> ( 7x X -11) 3 = 32x 25 +200
=> ( 7x X -11) 3 = 800 + 200 =1000
=> ( 7x X -11) 3 = 103
=> 7x X -11 = 10
=> 7x X = 10 +11 = 21
=> X =21 : 7 =3
=> X = 3
( 7 x - 11)3 = 25 x 52 + 200 = 1000
(7x - 11)3 = 103
\(\Rightarrow\)7x - 11 = 10
\(\Rightarrow\)7x = 21
\(\Rightarrow\)x = 3
ủng hộ nha!!
( 7 x X - 11 ) 3 = 25 x 52 + 200
=> ( 7 x X - 11 ) 3 = 32 x 25 + 200
=> ( 7 x X - 11 ) 3 = 800 + 200 = 1000
=> ( 7 x X - 11 ) 3 = 103
=> 7 x X - 11 = 10
=> 7 x X = 10 + 11 = 21
=> X = 21 : 7
=> X = 3
