Question

X-y=8&y=3
y=x+1&y=3x-y

Answer 1

X-y = 8
Y= 3
Substitusi kan y nya
X-3= 8
X=11

Y= x+1
Y=3x-y
Y=Y
X+1 = 3x - (x+1)
X-3x+x = -1 -1
-x = -2
X= 2
Y= 2+1 =3