Question

The number of benches in a class, if 4
students siton each bench in the class room
then 3 benches are left and if 3 students sit
on each bench 3 students left without
bench, is :​

Answer 1

Answer:

The number of students is 48

Step-by-step explanation:  

  Let the number of students = y

   Let the number of benches = x

FROM THE FIRST STATEMENT:

  y = 4x - 12

FROM THE SECOND STATEMENT :

   y = 3x + 3

SUBSTITUTING EQUATION 2 INTO EQUATION 1

 3x +3 = 4x - 12

REARRANGING

x = 15

SUBSTITUTING THE VALUE FOR X IN EQUATION 2

  Y = 3

     3 x 15 + 3 = 48