tolong kerjakan no 1 yang A dan C

A. y = -x + 6 ↝ x = 9
y = -9 + 6 ↝ y = -3 ↝ (9,-3)

C. 2x - 15y = 13 ↝ y = -3/4
↝ 2x - 15(-3/4) = 13
↝ 2x + (45/4) = 13
↝ 8x + 45 = 13
↝ 8x = 13 - 45
↝ x = -32/8
↝ x = -4 ↝ (-4,-3/4)

semoga membantu ^^