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7*x^3+x/5+3 = 7*x^3+x+49/5 // - 7*x^3+x+49/5
7*x^3-(7*x^3)+x/5-x-(49/5)+3 = 0
7*x^3-7*x^3+x/5-x-49/5+3 = 0
-4/5*x-34/5 = 0 // + 34/5
-4/5*x = 34/5 // : -4/5
x = 34/5/(-4/5)
x = -17/2
x = -17/2
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