( 17x - 25 ) : 8 + 65 = 9^2
( 17x - 25 ) : 8 + 65 = 81
( 17x - 25 ) : 8 = 81 - 65
( 17x - 25 ) : 8 = 16
( 17x - 25 ) = 16 x 8
( 17x - 25 ) = 128
17x = 128 + 25
17x = 153
x = 153 : 17
x = 9
\(\left(17x-25\right):8+65=9^2\)
\(\Leftrightarrow\left(17x-25\right):8=81-65\)
\(\Leftrightarrow\left(17x-25\right):8=16\)
\(\Leftrightarrow17x-25=16.8\Leftrightarrow17x=128+25\Leftrightarrow17x=153\Leftrightarrow x=153:17=9\)
(k cho mình với nhá!)
(17x-25):8+65=81
(17x-25):8 =81-65
(17x-25):8 =16
17x-25 =16x8
17x-25 =128
17x =128+25
17x =153
x =153:17
x =9
(17x-25):8+65=81
(17x-25):8 =81-65
(17x-25):8=16
(17x-25)=16.8
(17x-25)=128
17x=128+25
17x=153
x=135:17
x=9