Question

Jaime has a budget in which 1/4 of the money is for photocopying 3/7 of the money is for computer expenses and the rest of the money is for student tutors. What fraction of Jaime budget is for student tutors?

Answer 1

Let
x-------> Jaime budget
s------> fraction of Jaime budget for student tutors

we know that
x=(1/4)x+(3/7)x+s

3/7 is equal to-----> (3/7)*(2/2)----> 6/14
substitute
x=(1/4)x+(6/14)x+s
x=(7/14)x+s
s=x-(7/14)x
s=(7/14)x-------> (1/2)x------> half of the budget is for student tutors.

the answer is
half of the budget is for student tutors