/**
 * Solves literal equations with variables
 * @param {string} x - Equation string
 * @returns {string} Solution result
 * @example literalExpression("x+1=2"); // "1"
 * @example literalExpression("2x=6"); // "3"
 * @example literalExpression("3x+2=8"); // "2"
 */
export declare const literalExpression: (x: string) => string;