2 buku + 4 pulpen=69.000 3 buku + 2 pulpen=69.500 berapa harga 5 buku + 5 pulpen?

Buku = z
Pulpen = y

2z + 4y = 69.000 |x1|
3z + 2y = 69.500 |x2|

2z + 4y = 69.000
6z + 4y = 139.000
________________-
-4z = -70.000
z = -70.000/(-4)
z = Rp. 17.500

Subs z = 17.500
2z + 4y = 69.000
2(17.500) + 4y = 69.000
35.000 + 4y = 69.000
4y = 69.000-35.000
y = 34.000/4
y = Rp. 8.500

Buku (z) = Rp. 17.500
Pulpen (y) = Rp. 8.500

5 Buku + 5 Pulpen
5z + 5y
=> 5(17.500) + 5(8.500)
=> 87.500 + 42.500
=> Rp. 130.000

Semoga Membantu, Jika Tidak Jelas Bisa Di Tanyakan:)

Buku=x
Pulpen=y

2x + 4y=69000 | x1
3x + 2y=69500 | x2
------------------------+

2x + 4y=69000
6x + 4y=139000
-----------------------+
-4x=-70000
X=17500

2. 17500 + 4y= 69000
35000+4y=69000
4y=34000
Y=8500

5x+5y=87500+42500=130000