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x in (-oo:+oo)
102 = -4*x-(7*x)-8 // + -4*x-(7*x)-8
7*x-(-4*x)+8+102 = 0
4*x+7*x+8+102 = 0
11*x+110 = 0 // - 110
11*x = -110 // : 11
x = -110/11
x = -10
x = -10
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