Which of these systems of equations has no solution? 3x + 2y = -12 and 2x + 3y = -12
2x + 3y = 12 and 2x - 3y = 12
-3x + 3y = 13 and 2x -2y = -12
-3x - 2y = 12 and 3x + 2y = -12
Mateo chose C as the correct answer. How might he have gotten that answer?
(I just need help on the last part, not the system of equations having no solution.)

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

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