Así ya se puede construir la ecuación:
[tex]x*\left(\dfrac{1}{x} +4\right)=-45\\ \\ \\ \dfrac{x}{x} +4x=-45\\\\\\1+4x=-45\\\\\\4x=-45-1\\\\\\4x=-46\\\\\\x=-\dfrac{46}{4} \\\\\\\boxed{\bold{x=-11,5}}[/tex]
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Así ya se puede construir la ecuación:
[tex]x*\left(\dfrac{1}{x} +4\right)=-45\\ \\ \\ \dfrac{x}{x} +4x=-45\\\\\\1+4x=-45\\\\\\4x=-45-1\\\\\\4x=-46\\\\\\x=-\dfrac{46}{4} \\\\\\\boxed{\bold{x=-11,5}}[/tex]