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x - 12 = - (y + z)
z = x + y - 12
x² + y² - z² = - 2
Trial and error aja ini
x - 12 ≠ 0
maka:
y = (12x - 71)/(x - 12)
z = (x² - 12x + 73)/(x - 12)
x = - 61, y = 11, z = - 62
x = 11 , y = - 61 , z = - 62
x = 13 , y = 85 , z = 86
x = 85 , y = 13 , z = 86