Adding 1 to the given equation we get:
[tex]\begin{gathered} 5x+3+1=7x-1+1, \\ 5x+4=7x\text{.} \end{gathered}[/tex]Subtracting 5x from the above equation we get:
[tex]\begin{gathered} 5x+4-5x=7x-5x, \\ 4=2x\text{.} \end{gathered}[/tex]Finally, dividing by 2 we get:
[tex]\begin{gathered} \frac{4}{2}=\frac{2x}{2}, \\ 2=x\text{.} \end{gathered}[/tex]Answer: x=2.
