$$40x^2+2x = 24$$
Answer
$$ \begin{matrix}x_1 = \dfrac{ 3 }{ 4 } & x_2 = -\dfrac{ 4 }{ 5 } \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} 40x^2+2x &= 24&& \text{move all terms to the left hand side } \\[1 em]40x^2+2x-24 &= 0&& \\[1 em] \end{aligned} $$
$ 40x^{2}+2x-24 = 0 $ is a quadratic equation.
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