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x in (-oo:+oo)
(-7/2)*x+(16/4)*x = -2/4 // + -2/4
(-7/2)*x+(16/4)*x-(-2/4) = 0
(-7/2)*x+(16/4)*x+1/2 = 0
1/2*x+1/2 = 0 // - 1/2
1/2*x = -1/2 // : 1/2
x = -1/2/1/2
x = -1
x = -1
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