Question

Find an ordered pair (x, y) that is a solution to the equation.

-x+2y=1

(x, y) = ?

Answer 1

let x = 1:-

-(1) + 2y = 1
2y = 1 + 1 = 2
y = 1

so one ordered pair is (1, 1)

Answer 2

you can choose values of x and calculate , values of y
for example,
2y= x+1
y=(1/2)x +1/2

x=0, y=(1/2)*0 +1/2 = 1/2 point (0, 1/2)
x=3, y=(1/2)*3+1/2=3/2+1/2=4/2=2 point (3, 2)

and so on