Given the expression
[tex]3x-5+6x+7[/tex]To simplify this expression you have to perform the mathematical operations to all "alike" terms, this is, those who have the unknown value "x" go together and those that do not have the unknown go to another group:
[tex]\begin{gathered} 3x+6x-5+7 \\ 9x+2 \end{gathered}[/tex]
