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If $x=1$ is a solution of the equation $x^{2} + ax + 1 = 0$, what is the value of $a$?

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A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.

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Official solution

Since $x=1$ is a solution of the equation $x^{2} + ax + 1 = 0$, then $1^{2} + a(1) + 1 = 0$ or $2 + a = 0$ and so $a = -2$.

Source: Omni-MATH, licensed Apache-2.0. Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project.