[-2, 3],

  [2, 1],

];

const b = [11, 9];

const x = math.usolve(a, b); // [[8], [9]]

​

const equation = `

\\begin{bmatrix}

${a[0][0]} & ${a[0][1]}\\\\

${a[1][0]} & ${a[1][1]}

\\end{bmatrix}

\\begin{bmatrix}

${x[0]}\\\\

${x[1]}

\\end{bmatrix}

=

\\begin{bmatrix}

${b[0]}\\\\

${b[1]}

\\end{bmatrix}

`;

​

function setup() {

  createCanvas(400, 400);

  background(220);

  const tex = createTeX(equation);

  tex.style("font-size", "20px");

  tex.position(90, 170);

}

​

function createTeX(expression) {

  const tex = createP();

  katex.render(expression, tex.elt);

  return tex;

}

​