Answer:
[tex]x = 7[/tex]
Step-by-step explanation:
To solve for [tex]x[/tex] you need to isolate the [tex]x[/tex] terms to one side. We have to get rid of the negative 8. To get 0 from -8 we need to add 8. Anything you do to one side you do the other so:
[tex]3x- 8 = 13[/tex] : Add 8 to both sides.
[tex]3x = 21[/tex] : Now we have 3[tex]x[/tex] but we only want one. So divide both sides by 3.
[tex]x = 7[/tex]
