Which statement justifies the given ordered pair as a solution to the system of equations?

(−1, −13)

y={3x−10
−2x−15

Given that y = 3x – 10 and y = -2x -15 (-1 , -13) substituting equation 1 to the equation 2  
Y = 3x – 10
3x – 10 = -2x -15
3x + 2x = -15 + 10
5x = -5
X = -1  
Substitute -1  
Y = 3(-1) – 10
Y = -13
So the ordered pair a the solution the system of equtions given