find x +y if 4x+3y=24and3x+4y=25
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x+y
3+4
7
x+y
3+4
7
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Answered by
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Hey mate Ur ans:-
Solution:- Case - 1 , Adding eqn (1) and(2)
To find:- x+y = ?
4x +3y = 24.....(1)
3x +4y = 25.....(2)
------------------
7x +7y = 49..( Dividing by both sides 7) since, we get x+y =7.....(3)
Case-2, Substracting eqn (1) and(2)
4x+3y = 24....(1)
- 3x+4y = 25....(2)
---------------------
x - y = -1.....(4)
Adding eqn (3) and (4)
x + y = 7.....(3)
x - y = -1.....(4)
-----------------
2x = 6
x = 6/2
* x = 3
Put the value of x = 3 in eqn (3)
3 + y = 7
*y = 7 - 3
*y = 4
Solution of (x,y) = (3,4) ...... Ans Hope u understand.
Solution:- Case - 1 , Adding eqn (1) and(2)
To find:- x+y = ?
4x +3y = 24.....(1)
3x +4y = 25.....(2)
------------------
7x +7y = 49..( Dividing by both sides 7) since, we get x+y =7.....(3)
Case-2, Substracting eqn (1) and(2)
4x+3y = 24....(1)
- 3x+4y = 25....(2)
---------------------
x - y = -1.....(4)
Adding eqn (3) and (4)
x + y = 7.....(3)
x - y = -1.....(4)
-----------------
2x = 6
x = 6/2
* x = 3
Put the value of x = 3 in eqn (3)
3 + y = 7
*y = 7 - 3
*y = 4
Solution of (x,y) = (3,4) ...... Ans Hope u understand.
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