Question 1014388

hi-what property is used here:
-8X+59=27

I have solved it,  
X=4
but I don't know which property is used....?
can you helP/
<pre>Considering that you first subtracted 59 from (or ADDED - 59 to) both sides, the {{{highlight(highlight_green(highlight(matrix(1,4,Subtraction, Property, of, Equality))))}}} was used.