Selesaikan sistem persamaan berikut menggunakan metode substitusi A. 2x + 3y = 5 4x - y = 3 B. 4X - y = 3 2/3x + 5y = -1

a) 3y = 5 - 2x
y = 5-2x/3
4x - (5-2x/3) =3
(semua kali 3)
12x-(5-2)=9
12x-5+2= 9
12x-3= 9
12x= 9+3
12x = 12
x = 1

y= 5-2x/3
y = 5-2(1)/3
y= 3/3
y=1