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15-(x/6) = -8/3 // + -8/3
15-(x/6)-(-8/3) = 0
8/3-(x/6)+15 = 0
53/3-1/6*x = 0 // - 53/3
-1/6*x = -53/3 // : -1/6
x = -53/3/(-1/6)
x = 106
x = 106
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