Mel has $$\frac{6}{7}$$ as many marbles as Jay. Zack has$$\frac{1}{8}$$ as many marbles as Mel. Jay has 75 more marbles than Zack. <br> Jay and Mel want to give some of their marbles to Zack so that in the end, the two of them will each have 6 more marbles than Zack. <hr> How many marbles must Jay and Mel give to Zack altogether? <br> <input min="0" type="number" id ="imp6pg073q9b_1" class="lineinput" placeholder="?" />