Ta có
144x=56 + 130x
=>144x - 130x=56
=>14x=56
=>x=4
(-12)2 . X = 56 + 10 . 13 . X
144.X = 56 +130 .X
144 . X - 130 . X= 56
14 . X = 56
X = 56 : 14 = 4
\(\left(-12\right)^2.x=56+10.13x\)
\(\Leftrightarrow144x=56+130x\)
\(\Leftrightarrow144x-130x=56\)
\(\Leftrightarrow14x=56\Leftrightarrow x=4\)
Chúc em học tốt!!!