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x in (-oo:+oo)
(-9/7)*x = 12.06 // - 12.06
(-9/7)*x-12.06 = 0
-9/7*x-12.06 = 0 // + 12.06
-9/7*x = 12.06 // : -9/7
x = 12.06/(-9/7)
x = -9.37999997
x = -9.37999997
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