Answer:
x = 95 - 4y
Step-by-step explanation:
Let the pieces he has now be a variable x and the no. of students in his class be y, So the pieces he gave to everyone become 4y (note that 4 here means he had given four to each) and as he had won 95 pieces at the fair in the starting,
therefore the equation becomes:-
x = 95 - 4y