Question 1019079
(5,12) means x = 5 when y = 12, or y = 12 when x = 5.


equation is y = -4x + 3


when x = 5, y = -4x + 3 becomes y = -4*5 + 3 which becomes y = -20 + 3 which becomes y = -17.


when y = 12, y = -4x + 3 becomes 12 = -4x + 3.
subtract 3 from both sides of this equation to get 9 = -4x
divide both sides of this equation by -4 to get x = -9/4.


(5,12) is not a solution to the equation of y = -4x + 3.