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x in (-oo:+oo)
3-(2*x) = (1/2)*(8*x+14) // - (1/2)*(8*x+14)
3-((1/2)*(8*x+14))-(2*x) = 0
(-1/2)*(8*x+14)-2*x+3 = 0
3-1/2*(8*x+14)-2*x = 0
3-1/2*(8*x+14)-2*x = 0
3-6*x-7 = 0
-6*x-4 = 0
-6*x-4 = 0
-6*x-4 = 0 // + 4
-6*x = 4 // : -6
x = 4/(-6)
x = -2/3
x = -2/3
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