selesaikan sistem persamaan berikutsubstitusi.......A..5x-3y=15..5x+y=15

5x-3y=15
5x+y=15
—————— (-)
-4y=0
y=0

5x+y=15
5x+0=15
5x=15
x=3

5x - 3y = 15 (1)
5x + y = 15 -> y = 15 - 5x (2)

Subtitusi persamaan (2) ke (1)

5x - 3y = 15
5x - 3(15 - 5x) = 15
5x - 45 + 15x = 15
20x = 15 + 45
x = 60/20
x = 3

5x + y = 15
5(3) + y = 15
15 + y = 15
y = 15 - 15
y = 0

Semoga membantu..