findCombination.js

const findCombination = function (totalMoney, priceA, priceB, totalHeads) {
  const result = [];
  let countA, countB;
  for (let i = 0; i < totalHeads; ++i) {
    countA = i;
    countB = totalHeads - i;
    if (totalMoney === (countA * priceA + countB * priceB)) {
      result.push([countA, countB]);
    }
  }
  return result;
}

console.log(findCombination(550, 30, 25, 19));