Distributive, if you do 4 times x and 4 times 2 you get 4x+8
First multiply every thing by 7 to get rid of the fraction.
(y/7)(7) +6(7)=11(7)
y+42=77
y=35
Just add them together. For example if you have 4x and 7x you would just do 4x+7x and get 11x. You can only add them because they are like terms, meaning that they share a variable.
82 / n - 26 is the correct expression (that's the 4th choice).
Choice 2 is also correct. Also the 5th is correct.
82 / 2 - 26
= 41 - 26 = 15
So the last choice is also correct.
The most usfull tool would be a compas