X+2y=4. (-4,?). Find the missing coordinates

Question

It is a difficult answer

 

Answer 1

No way is this difficult!! Take the x value, -4, and plug it in for x. lYou get an equation involving only the letter y.

You can solve that, thus discovering what ordered pair satisfies the equation, i.e. you've found the coordinates of a point on this line.

Answer 2

x + 2y = 4

-4 + 2y = 4             substitute -4 for x

2y = 8                    add 8 to both sides

y = 4                      divide both sides by 2

 

(-4, 4)