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-kuda = x
-kambing = y
1 kuda + 6 kambing = x + 6y = 320
3 kuda + 4 kambing = 3x + 4y = 400
Eleminasi
x + 6y = 320 | x3 | 3x + 18y = 960
3x + 4y = 400 | x1 | 3x + 4y = 400
------------------------ -
14y = 560
y = 40 kg
Subtitusikan
x + 6y = x + 6(40)
320 = x + 240
x = 80kg
maka, 7 kuda = 7x
= 7(80)
= 560kg
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