36 * (x - 9) = 900
x - 9 = 900 : 36
x - 9 = 25
x = 25 + 9
x = 34
36 x ( x - 9 ) = 900
x - 9 = 900 : 36
x - 9 = 25
x = 25 + 9
x = 34
nha
36*(x-9) = 900
x-9=900:36
x-9 = 25
x = 25 + 9
x=34
\(36.\left(x-9\right)=900\)
\(\Leftrightarrow x-9=25\)
\(\Leftrightarrow x=34\)