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harga beras: b
harga telur: t
g = 4/3 b ... (1)
b = 2/5 t ... (2)
g - b = 2.400 ... (3)
substitusi 1 ke 3
g - b = 2.400
4/3 b - b = 2.400
4/3 b - 3/3 b = 2.400
1/3 b = 2.400
b = 2.400 x 3
b = 7.200
substitusi b = 7.200 ke 2
b = 2/5 t
t = 5/2 b
t = 5/2 x 7.200
t = 18.000
jadi harga telur Rp. 18.000,00
semoga membantu ya :)
B=2/5t
G-b= 2400
4/3b-3/3b=2400
1/3b=2400
B=7200
7200=2/5t
T=2880