Question

check whether (1,-1) is solution of x+y=0

Answer 1

Answer:

Yes it is

Step-by-step explanation:

x + 1 = 0

x=-1

-1+y = 0

y= 1

-1+1= 0

*Thus (1,-1) is the solution set for or x+y=0*

Answer 2

x+y=0______(1)

x=1,y=-1

put the values of x and y in equation 1

1+(-1)=0

0=0

LHS=RHS

Yes,(1,-1) is solution of x+y=0

Hope it helps you.