Five less than the quotient of a number and six is 12

The spring the owner of a sporting good store decreases the price of winter gloves from $10 to $8 each increases the price of swimming goggles from $8 to $10 without doing the math you think the percent decrease in the price of the gloves the same as the percent increase of the goggles explain why or why not

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

How do you use the elimination method for this question? explain, because i really want to understand!