Question

please ans. this que

Answer 1

Let the number of students = y
let the number of benches = x

from the first statement
y=4x−12 (three empty benches * 4 students)

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⋅15+3=48

Answer 2

Let the number of students = y

let the number of benches = x

from the first statement y=4x−12 (three empty benches * 4 students)

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(15)+3=48