\(7\left(3x-3\right)=\left(2x+2\right)3\)
\(21x-21=6x+6\)
\(21x-21-6x-6=0\)
\(15x-27=0\)
\(15x=27\)
\(x=\frac{27}{15}=\frac{9}{5}\)
7 ( 3 x - 3 ) = ( 2 x + 2 ) 3
4 (3 x - 3 ) = 2 x + 2
12 x - 12 = 2 x +2
2x +9x = 2x +2
2 = 9 x
=> x = 2 : 9
=> x = rỗng
Vậy x = rỗng