Question 229516
1.  y-1>-17


In order to "undo" the -1, you need to add +1 to each side:
y-1+1>-17+1
y>-16


Now, the answer is given in what is called "set builder" notation, which is this:
{y|y>-16}


Translated into English: "the set" "of all values of y" "such that" "y>-16".


"{"="set"
"y"="of all values of y" 
"|" the vertical line means "such that"


2.  d=2e , to get rid of the 2, which is multiplied by the "e", you have to "undo" it by DIVIDING both sides by 2:
{{{d=2e}}}
{{{d/2=(2e)/2}}}
{{{d/2=e}}}


Dr. Robert J. Rapalje