Use distributive property on both sides of the equation:
[tex]\begin{gathered} 6\cdot x-6\cdot3=2\cdot x+2\cdot5 \\ 6x-18=2x+10 \end{gathered}[/tex]Subtract 2x from both sides, and 18 to both sides:
[tex]\begin{gathered} 6x-18-2x+18=2x+10-2x+18 \\ 4x=28 \end{gathered}[/tex]Divide both sides by 4:
[tex]\begin{gathered} \frac{4x}{4}=\frac{28}{4} \\ x=7 \end{gathered}[/tex]