y=infinity and beyond but I don't get how... plz explain? y+3-(7+y)=-4
y+3-(7+y)=-4
I look at the left hand side
y+3-(7+y)
= y+3-1(7+y)
=y+3 -1*7+-1*y
=y+3-7-y
=3-7
=-4
=right hand side aways!
So y can be absolutely any number and this statement will always be true!
