Question

Find whether (-2,2) is the solution of y-x=0.

Answer 1

y=2
x=-2
given equation
y-x=0
2-(-2)=2+2=4
therefore (-2,2)is not a solution of the equation y-x=0

Answer 2

y=2
x=-2

y-x=0
2-(-2)= 2+2=4
therefore it is not a solution for y-x=0