Question Number 128822 by Maclaurin Stickker last updated on 10/Jan/21
$${Find}\:{all}\:{positive}\:{integers}\:{a},\:{b},\:{c}\:{and}\:{d} \\ $$$${such}\:{that}\:\mathrm{2}^{{a}} =\mathrm{3}^{{b}} ×\mathrm{5}^{{c}} +\mathrm{7}^{{d}} \\ $$
Find-all-positive-integers-a-b-c-and-d-such-that-2-a-3-b-5-c-7-d-