Vì 2 góc đã cho là 2 góc trong cùng phía
\(\Rightarrow\left(4x-2\right)^0+\left(5x-7\right)^0=180^0\)
\(\Rightarrow\left(4x-2+5x-7\right)^0=180^0\)
\(\Rightarrow\left(9x-9\right)^0=180^0\)
\(\Rightarrow9\left(x-1\right)=180\)
\(\Rightarrow x-1=20\)
\(\Rightarrow x=21\)
\(\Rightarrow\left(4x-2\right)^0=\left(4\cdot21-2\right)^0=82^0\)