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x in (-oo:+oo)
-10*x-10 = (10^7)/7 // - (10^7)/7
-10*x-((10^7)/7)-10 = 0
-10*x-10000070/7 = 0 // + 10000070/7
-10*x = 10000070/7 // : -10
x = 10000070/7/(-10)
x = -1000007/7
x = -1000007/7
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