Which of the ordered pairs in the form (x, y) is a solution of this equation? 5x-y/3 = 13 (2, - 9), (3, - 6)

a. The first is not a solution, but the second is.

b. Neither is a solution.

c. The first is a solution, but the second is not.

d. Both are solutions.

C. The first is a solution, but the second is not.

5x - y/3 = 13; (2,-9)

substitute the letters:

5 (2) - (-9/3) = 13

10 - (-3) = 13 : note that deducting a number with a negative sign turns both sign as positive.

10 + 3 = 13;

13 = 13

5x - y/3 = 13; (3,-6)

5 (3) - (-6/3) = 13

15 - (-2) = 13

15 + 2 = 13

17 = 13 not equal. not a solution