To find an x value so that the line will be parralel:
Set both values equal to each other and solve for x - value
[tex]\begin{gathered} 3x-1=x+11 \\ \text{collect like terms} \\ 3x-x=11+1 \\ 2x=12 \\ \text{divide both side by 2} \\ \frac{2x}{2}=\frac{12}{2} \\ x=6 \end{gathered}[/tex]
Therefore the correct value of x = 6
