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x in (-oo:+oo)
(2/3)*(15-(12*x)) = 74 // - 74
(2/3)*(15-(12*x))-74 = 0
(2/3)*(15-12*x)-74 = 0
2/3*(15-12*x)-74 = 0
2/3*(15-12*x)-74 = 0
-8*x-64 = 0
-8*x-64 = 0
-8*x-64 = 0 // + 64
-8*x = 64 // : -8
x = 64/(-8)
x = -8
x = -8
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