L = 4a + 6b + 8c
¹/₂ · L = ¹/₂ · (4a + 6b + 8c) = 2a + 3b + 4c
Odp. A
- 6b = 4a + 8c - L |:(-6)
b = - ⁴/₆ a - ⁸/₆ c + /¹₆ L
b = - ²/₃ a - ⁴/₃ c + ¹/₆ L
b = ¹/₆ L - ²/₃ a - ⁴/₃ c
Odp. C
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L = 4a + 6b + 8c
¹/₂ · L = ¹/₂ · (4a + 6b + 8c) = 2a + 3b + 4c
Odp. A
L = 4a + 6b + 8c
- 6b = 4a + 8c - L |:(-6)
b = - ⁴/₆ a - ⁸/₆ c + /¹₆ L
b = - ²/₃ a - ⁴/₃ c + ¹/₆ L
b = ¹/₆ L - ²/₃ a - ⁴/₃ c
Odp. C