Answer:
First option is the correct one because when we apply the equation given this is what is gives
Answer:
To find the reciprocal of a fraction all you need to do is flip it upside down.
I don't know what you mean but if it's 18/7 the reciprocal would be 7/18.
If it's a whole number (so just 18) convert it to an improper fraction (so 18/1) and then flip it. (1/18.)
Very easy. You isolate the y variable and solve from there:
-y-y = -16+23
-2y = 7
y = 7/-2