Question

there are two class rooms A and B. if 5 students are sent from A and B, then the numbers of students in each class room is same. if 10 students are sent from B to A, then the numbers of students in A is double the number of students in B. then the number of students in A is ?​

Answer 1

Answer:

A-5=b+5

A-B=5+5=10

2(B-10)=A+10

2B-20=A+10

2B-A=10+20

=30

2B=30+A

SUBTRACTING EQ 2 FROM EQ 1

30+A=2B

-B+A=10

30+B=2B-10

30+10=2B-B

B=40

A=10+B

=50

ANS 50