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L = 2
dan M = -6
a. -K -5L + 2M = -(-2) -5(2) + 2(-6) = 2 - 10 - 12 = -8 - 12 = -20
b. -4K - 2L + 6M = -4(-2) - 2.(2) + 6(-6) = 8 - 4 - 36 = 4 - 36 = -32
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