selesaikan sistem persamaan substitusi .5x-3y=15.......5x+y=5??

5x + y = 5 ====> y = -5x + 5

5x - 3y = 15
5x - 3(-5x + 5) = 15
5x + 15x - 15 = 15
20x = 15 + 15
20x = 30
x = 30/20
x = 3/2

y = -5x + 5
y = -5(3/2) + 5
y = -15/2 + 5
y = -7,5 + 5
y = -2,5
y = -2 1/2

HP = {3/2,-2 1/2}

5x-3y = 15
5x + y = 5
_________ _
-2y = 10
y = -5

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