3^2- x + 2^2 . x = 26.2^2 - 13
<=> 9 - x + 4x = 26.4 -13
<=> 3x = 104 - 13 - 9
<=> x = 82 / 3
\(3^2-x+2^2x=26\cdot2^2-13\)
\(9-x+4x=26\cdot4-13\)
\(3x=104-13-9\)
\(3x=82\)
\(x=\frac{82}{3}\)
Bài làm
\(3^2-x+2^2x=26.2^2-13\Leftrightarrow9-x+4x=104-13\)
\(\Leftrightarrow3x=82\Leftrightarrow x=\frac{82}{3}\)