Tolong bantu jawab ya!!!

Mapel : Matematika
bab : Pecahan dan Bilangan bulat

1)

-7 × 5 + 3(5)
= -35 + 15
= -20

B

2)

1/x = 1/12 + 1/6
1/x = _______12
1/x = 1 + 2/12
1/x = 3/12
x = 12/3
x = 4 Hari

B