Evaluate he following equation.

Question

x−2y=3.

Determine the missing coordinate in the ordered pair (−4 ,?) so that it will satisfy the given equation.

Answer 1

x-2y=3

-2y=3-x

y=(x-3)/2=f(x)

f(-4) =(-4-3)/2 = -7/2

(x,y) = (-4, -7/2)

Answer 2

x - 2y = 3 ; (4,?)

x = 3 + 2y

1. Add 2y to both sides to get the above equation.

x - 3 = 2y

1. Add 3 to both sides to get the above equation.

(x - 3) / 2 = y

1. Divide both sides by 2 to get the above equation.

(-4 + -3) / 2 = y

1. Plug in the 4 from the given information, (4,?) = (x,y).

-7 / 2 = y

y = -3.5