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Write the equivalent inequalities.
The solutions of |
are all values of
that lie between –
So, the inequality can be rewritten as
Adding 7 to each part of the inequality,
So, the solution set is all real numbers that are greater than 1 and less than 13. In interval notation, the solution is (1, 13).
Mark the boundary points.
The inequalities are
. Mark both the boundary points with parentheses.
The solution set includes all real numbers greater than 1 and less than 13.
Here, the solution set includes all real numbers greater than 1 and less than 13. So, draw a segment connecting the boundary points.
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