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The solution to $-4 < 2(x - 1) < 8$ is expressed in the form $a < x < b$. Find the value of $a + b$.

 May 4, 2018
 #1
avatar+101151 
+3

-4 < 2(x - 1) < 8          divide through by  2

 

-2 <  x  - 1 <  4           add 1 to everything

 

-1 < x  < 5

 

So

 

a + b  =

 

-1  +  5  =

 

4

 

 

cool cool cool

 May 4, 2018
 #2
avatar+50 
+2

These are homework problems! Should be attempted first!

wink

 May 4, 2018

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