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x in (-oo:+oo)
(1/2)*(4*x-10) = (1/3)*(15*x+6) // - (1/3)*(15*x+6)
(1/2)*(4*x-10)-((1/3)*(15*x+6)) = 0
(1/2)*(4*x-10)+(-1/3)*(15*x+6) = 0
1/2*(4*x-10)-1/3*(15*x+6) = 0
1/2*(4*x-10)-1/3*(15*x+6) = 0
-3*x-7 = 0
-3*x-7 = 0
-3*x-7 = 0 // + 7
-3*x = 7 // : -3
x = 7/(-3)
x = -7/3
x = -7/3
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