Question

Kalau yang begini rumusnya gimana ya??minta tolong bantuannya

Answer 1

2n = 5j
n + j = Rp17500
n = 17500 - j
=> 2n = 5j
2(17500 - j) = 5j
35000 - 2j = 5j
-2j - 5j = -35000
-7j = -35000
j = 5000
jadi 3 jus = 3 x 5000 = Rp15000

Answer 2

Misal: x = nasi
y = jus

*
2x = 5y
x + y = 17.500
3y = ? 

*
2x - 5y = 0 | *1
x + y = 17.500 | *2

2x - 5y = 0
2x + 2y = 35.000 _
-7y = .35.000
y = 5.000 (jus)

* 
x + y = 17.500
x = 12.500

*
3y = 3(5000)
= 15.000