To answer this question we will isolate x.
Adding 7.5 to the given equation we get:
[tex]\begin{gathered} 3x-7.5+7.5=22.5+7.5, \\ 3x=30. \end{gathered}[/tex]Dividing the above result by 3 we get:
[tex]\frac{3x}{3}=\frac{30}{3}.[/tex]Simplifying the above result we get:
[tex]x=10.[/tex]Answer: Second option.
[tex]x=10.[/tex]
