there are some girls in 2 classroom A&B if 12 girls are sent from A to B the number of girls in boyh the rooms will be equal if 11 girls are sent from room B to room A then the no of girls in room A would be double the number of girls in room B how many girls are there in both the class rooms its a (SIMULTANEOUS LINEAR EQUATION)
2007-01-15 23:18:29 · 5 answers · asked by tweet 1 in Science & Mathematics ➔ Mathematics
Very bad... you are doing your homework here...
ne ways
eqns are: a - 12 = b+12
and a+11 = 2(b-11)
solving for b,
b+24 + 11 = 2b -22
or b = 57
so a = 81
2007-01-15 23:27:17 · answer #1 · answered by Sandeep K 3 · 0⤊ 0⤋
Hey,
Lets do this in the simple way.
Lets say A and B are the two variables to be solved if we take this problem as a linear equation
we have A -12 = B + 12,
A - B = 24 -----------(1)
and A + 11 = 2(B - 11)
=> A + 11 = 2B - 22
=> A - 2B = -33 ---(2)
(1) - (2) =>
A - B -A + 2B = 24 + 33
=> B = 57
Substite the value of B in (1)
=> A - B = 24
=> A - 57 = 24
=> A = 81
Hence, No of Girls in Class A is 81 and
No of Girls in Class B is 57
Peace out.
2007-01-16 07:26:50 · answer #2 · answered by Pradyumna N 2 · 0⤊ 0⤋
B=57
A=81
A -12 = B +12 and B -11 = (A+11)/2
substitute A or B in either equation to solve.
2007-01-16 07:37:18 · answer #3 · answered by happy d 2 · 0⤊ 0⤋
A-12 = B+12......(1)
A+11 = 2(B-11)......(2)
(2)-(1):
23 = B-34
B = 57
A = B+24 = 81
2007-01-16 12:39:13 · answer #4 · answered by sahsjing 7 · 0⤊ 0⤋
A = 81
B = 57
2007-01-16 07:24:31 · answer #5 · answered by baka_otaku30 5 · 0⤊ 0⤋