Question

what is the solution for x + y = minus 1​

Answer 1

= x+y = -1
Let x= -5
= -5 + y = -1
= y = -1 + 5 = 4
Hence if x is -5 then y is 4

( it is not important to take x = -5, as it is not mentioned in the question we take it as default to prove the situation )