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Variables review find x if:-2×+7=20

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Given the following equation:


-2x+7=20

to solve for 'x', first we need to substract 7 from both sides of the equation to get:


\begin{gathered} -2x+7-7=20-7 \\ \Rightarrow-2x=13 \end{gathered}

next, we can divide both sides by -2 to get the following:


\begin{gathered} (1)/(-2)\cdot(-2x=13) \\ \Rightarrow(-2)/(-2)x=(13)/(-2) \\ \Rightarrow x=-(13)/(2) \end{gathered}

therefore, x = -13/2

User Emilce
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