Question

there are 2 class room a and b if 10 students are sent from a and b the no. of students in each room becomes the same if 20 students are sent from b to a the no. of students in a becomes double the no. of students in b find the no. of students in each class room
pls solve it its urgent incorrect answer will be reported​

Answer 1

Answer:

안녕하세요

Step-by-step explanation:

Let the number of students in classroom A be x  Let the number of students in classroom B be y.  If 10 students are transferred from A to B, then we have:  x – 10 = y + 10  ⇒x – y = 20 …..(i)  If 20 students are transferred from B to A, then we have:  2(y – 20) = x + 20  ⇒2y – 40 = x + 20  ⇒ -x + 2y = 60 …..(ii) On adding (i) and (ii), we get:  y = (20 + 60) = 80  On substituting y = 80 in (i), we get:  x – 80 = 20  ⇒x = (20 + 80) = 100  Hence, the number of students in classroom A is 100 and the number of students in classroom B is 80.

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(maybe it is incorrect..but please do not report..I request you)

Answer 2

Let the number of students in classroom A be x

Let the number of students in classroom B be y.

If 10 students are transferred from A to B, then we have:

x – 10 = y + 10

⇒x – y = 20 …..(i)

If 20 students are transferred from B to A, then we have:

2(y – 20) = x + 20

⇒2y – 40 = x + 20

⇒ -x + 2y = 60 …..(ii)

On adding (i) and (ii), we get:

y = (20 + 60) = 80

On substituting y = 80 in (i), we get:

x – 80 = 20

⇒x = (20 + 80) = 100

Hence, the number of students in classroom A is 100 and the number of students in classroom B is 80.