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x in (-oo:+oo)
8 = x+2*(-3/4) // - x+2*(-3/4)
8-x-(2*(-3/4)) = 0
3/2-x+8 = 0
19/2-x = 0 // - 19/2
-x = -19/2 // * -1
x = 19/2
x = 19/2
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