Question

check wheather (1, -2) is a solution of 2x -y=6

Answer 1

Answer:

put x=1 andy=-2

2x-y

2×1-(-2

2+2=4

LHS is not equal to RHS

hence (1,-2)is nit a solution of this equation

Answer 2

Step-by-step explanation:

if x=1

=2x-y=6

=2(1)-y=6

=y=-6

now substitute. (x=-2)

2x-(-6)=6

-4+6=6

2=6

hence ,(1,-2) it's not the solution