Question 793913
|2d-2|<10.8
-10.8 < 2d-2 < 10.8         [ this is the pattern for < ]
-8.8 < 2d < 12.8
-4.4 < d < 6.4
therefore this is the open interval (-4.4, 6.4) on the number line
an open interval includes all real numbers between the two end points BUT not the endpoints themselves!
here is the number line and the two points identified
{{{number_line( 600, -6, 7, -4.4, 6.4 )}}}