So that means that x or y cant have an exact number because it can be any number, like it cant be x=2, it must be like x € (-infinite,infinite) like the inequations is that what you mean?
Hello! Im new here! And i really like this site! So heres is my problem:
Well i know how to solve a simple equation with 2 incognites like:
x+y=2
x+4=2y
So in this case i do a substitue y=x-2 and use it in the second equation and it would be like:
x+4=2(x-2)
But the problem is...