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x in (-oo:+oo)
(1/3)*(6-(15*x)) = 2+4 // - 2+4
(1/3)*(6-(15*x))-4-2 = 0
(1/3)*(6-15*x)-4-2 = 0
1/3*(6-15*x)-4-2 = 0
1/3*(6-15*x)-4-2 = 0
-5*x-2-2 = 0
-5*x-4 = 0
-5*x-4 = 0
-5*x-4 = 0 // + 4
-5*x = 4 // : -5
x = 4/(-5)
x = -4/5
x = -4/5
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