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6x + 5 = 0
6x=-5
x = -5/6
6.-5/6 - 5 = 5-5= 0
-3x-6=0
-3x=6
x=-2
-3.-2 - 6 = 6-6= 0
6x+5+(-3x-6) = 6x+5-3x-6 = 6x-3x+5-6 = 3x-1
(negatif (-) dikali positif (+) jadi negatif (-))