Solve : | -2r - 1 | = 11

Michltm asked Aug 17, 2023

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16 votes

Michltm asked Aug 17, 2023

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16 votes

Given the equation :

The given absolute function will be written as :

So, for the first equation :

$\begin{gathered} -2r-1=11 \\ -2r=11+1 \\ -2r=12 \\ r=(12)/(-2)=-6 \end{gathered}$

For the second equation :

$\begin{gathered} -2r-1=-11 \\ -2r=-11+1 \\ -2r=-10 \\ r=(-10)/(-2)=5 \end{gathered}$

So, the answer is : r = { -6 , 5 }

Stoj answered Aug 21, 2023

by Stoj

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