Question

x=2, y=-1 is solution of the line equal to
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Answer 1

(3)x + y = 1

Is ur answer mate

Hope it helps :)

Answer 2

so lets solve each of them one by one

(1) 2x + 3y = 5

LHS

2x + 3y

when x = 2 and y = -1

2*2 + 3*(-1)

= 4 + (-3)

=1

RHS

5

LHS is not equal to RHS

(2) x = y= 5

LHS

x + y

when x=2 , y=-1

2-1

=1

RHS

5

therefore LHS isnt equal to RHS

(3) x + y = 1

LHS

x + y

when x=2 y=-1

2-1

=1

RHS

=1

Therefore LHS = RHS

So the solution x=2 and y=-1 is for the tird option.