Question

X-y=y
2(x-y)+y=15
tolong dijawab dengan cara PLDV substitusi???

Answer 1

X-y=y

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

X-y=y
X-5=5
X=5+5
X=10

jadi, x=10 dan y=5