The solution to $-4 < 2(x - 1) < 8$ is expressed in the form $a < x < b$. Find the value of $a + b$.
-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
These are homework problems! Should be attempted first!
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