two triangles are congruentes when all sides measure the same
so first and second side are equals , just need than the third side are equal
then we match
[tex]2x-1=4x-4[/tex]
and solve x
[tex]\begin{gathered} -1+4=4x-2x \\ 3=2x \\ x=\frac{3}{2} \end{gathered}[/tex]
x is 3/2 and the third side measure 2
[tex]\begin{gathered} 2(\frac{3}{2})-1 \\ \\ =2 \end{gathered}[/tex]
