(24-y)/4=4
i need to solve for y but cannot remember how to execute the process

You need to isolate the variable by itself on one side of the equation.  You do so by performing the inverse operations that were done to the variable

(24-y)/4=4  multiply both sides by 4

24-y=16  subtract 24 from both sides

-y=-8  divide both sides by -1

y=8

Jsnsndndnfjndndndndnd

The answer is: y would equal 3 because if you simplify the equation then it would be y= 3x+9 and if you divide 3x and 9 by 3 it would equal 3. y= 3