selesqikan sistem prrsamaan berikut dg substitusi...5x-3y=15...5x+y=5

5x - 3y = 15
5x = 3y + 15
disubtitusikan ke pers :
5x + y = 5
(3y + 15 ) + y = 5
4y = 5 - 15
4y = - 10
y = - 10/4
y = - 5/2
subtitusi ke pers :
5x = 3y + 15
5x = 3(-5/2) + 15
5x = - 15/2 + 15
5x = - 15/2 + 30/2
5x = 15/2
x = 15/2 ÷ 5
x = 15/2 × 1/5
x = 3/2
hp = ( 3/2 , - 5/2 )