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export default function solveEquation(equation: string): string {    //console.log(fa.toString(),fb.toString(),)    //console.log(a,b)    const [a, b] = parse_equation(equation);    if (a !== 0) return "x=" + b / a;
    if (a === 0 && b === 0) return "Infinite solutions";
    return "No solution";}
function fmt_num_x(s: string) {    if (/\d+/g.test(s)) return s.replace("x", "");    return s.replace("x", "1");}function parse_equation(equation: string) {    const [left, right] = equation.split("=");    const reg = /((?<a>[-+]?(\d+)?x)|(?<b>[-+]?(\d+)))/g;    const el = Array.from(left.matchAll(reg)).map((r) => r.groups);    const er = Array.from(right.matchAll(reg)).map((r) => r.groups);
    const cl = el.filter((g) => g?.a).map((g) => fmt_num_x(g?.a ?? ""));    const cr = er.filter((g) => g?.a).map((g) => fmt_num_x(g?.a ?? ""));    const nl = el.filter((g) => g?.b).map((g) => g?.b);    const nr = er.filter((g) => g?.b).map((g) => g?.b);    //console.log(cl,cr,nl,nr)    const bodya = "return " +        (cl.length ? cl.join(" ") : "0 ") +        `-(${cr.length ? cr.join(" ") : "0"})`;    const bodyb = "return " +        (nr.length ? nr.join(" ") : " 0 ") +        `-(${nl.length ? nl.join(" ") : " 0 "})`;
    //console.log(bodya,bodyb)    //return ""    const fa = new Function(bodya);
    const a = fa();    const fb = new Function(bodyb);
    const b = fb() ?? 0;    return [a, b];}