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x in (-oo:+oo)
7-((6/5)*x) >= 8 // - 8
7-((6/5)*x)-8 >= 0
(-6/5)*x-8+7 >= 0
-6/5*x-1 >= 0 // + 1
-6/5*x >= 1 // : -6/5
x <= 1/(-6/5)
x <= -5/6
x in (-oo:-5/6>
(-oo:-5/6>
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