I need help to set up an equation the find the value of x. Then, to explain my reasoning.

the two horizontal lines are parallel so that mean that:
[tex]70=3x-14[/tex]and we can solve for x
[tex]\begin{gathered} 70-14=3x \\ 56=3x \\ x=\frac{56}{3} \\ x=18.66 \end{gathered}[/tex]