In an equation x = y + k
Where: "$x$" is a known variable, "$y$" is an unknown variable and "$k$" is an unknown constant.
How could "$y$" and "$k$" values be calculated?
Is it possible to get exact values?
My initial thinking is that it can't be solved, but since my math knowledge is very basic I'd like some opinions, and of course the reasoning behind.
Thanks in advance.