Pakai cara ya kakakk ! Nanti di jadikan jawaban terbaikkkk

11.Senin : 1-3/8 = 8/8 - 3/8 = 5/8
Selasa : 5/8-1/2 = 5/8 - 4/8 = 1/8

1/8 = 320
5/8 = 960 kg

12.2x+3y+3z=15000
Perbandingan : x :5
y :3
z :2
2(5)x+3(3)x+2(3)x=15000
10x+9x+6x=15000
25x=15000
X=600
Maka: buku : 5 x 600 = 3000
buku gambar : 3 x 600 = 1800
pensil : 2 x 600 = 1200
3x+y+2z =
3 (3000) + 1 (1800) + 2 (1200) =
9000 + 1800 + 2400 = 13200