well, clearly the LCD from the denominators of 5 and 10 is just 10, thus

Answer:
without the sales, he would have spent $44.57
Step-by-step explanation:
Let the amount he would have spent without the sales be x. Now, if there is a 65% discount, what this means is that he is exactly paying for 100 - 65% = 35%
Now, it is this 35% of X that is equal to the amount he paid
Thus, mathematically, we have the following;
35/100 * x = 15.60
35x = 15.6 * 100
35x = 1560
x = 1560/35
x = $44.57
This means that without the sales discount, he would have paid $44.57
The answer to this question is 10.6
Do u have to use all of them? If not they could be 182 or 343
28/5, you cross multiply so 4/5=y/7 would become 5y=28 then you solve for y from there which becomes 28/5