Given the following equation:
[tex]-2x+7=20[/tex]to solve for 'x', first we need to substract 7 from both sides of the equation to get:
[tex]\begin{gathered} -2x+7-7=20-7 \\ \Rightarrow-2x=13 \end{gathered}[/tex]next, we can divide both sides by -2 to get the following:
[tex]\begin{gathered} \frac{1}{-2}\cdot(-2x=13) \\ \Rightarrow\frac{-2}{-2}x=\frac{13}{-2} \\ \Rightarrow x=-\frac{13}{2} \end{gathered}[/tex]therefore, x = -13/2
