The hardest 6th grade math problem answer= 1000 points do the sixth grade on and read the title to do it

What is the inverse of the function f(x)=4x+8

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Which of the following equations is equivalent to x/3-6/x=1