gan tolong bantuan Nya gan

Kelas 8 Matematika
Bab Persamaan Garis

3] Gambar terpotong

4] mobil = a
motor = b

a + b = 85 → dikali 2 → 2a + 2b = 170

4a + 2b = 220
2a + 2b = 170
---------------------- -
2a = 50
a = 50/2
a = 25

a + b = 85
25 + b = 85
b = 85 - 25
b = 60

Mobil = 25 unit
Motor = 60 unit

motor + mobil = 85 
motor = 85 - mobil...(1)

1 motor = 2 roda
1 mobil = 4 roda


2motor + 4mobil = 220
2(85-mobb) + 4mob = 220
170 - 2mobb + 4mob = 220
2mob = 50
mobil = 25

2mtr = 50
mtr = 50/2
mtr = 25

mtr + mob = 85
25 + mob = 85
mob = 85 - 25
mob = 60

Jadi, jumlah mobil nya ada 25 dan motor 60