Help me please anyonee

What is the equation and solution for the sentence? the sum of a number and thirty-one is one hundred thirteen. write the equation as n-31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and add 31 to both sides. the answer is 144. write the equation as n-31=113 and add 31 to both sides. the answer is 144.

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20