If 3x +5y=9 and 5x+3y=7 then find x+y=
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Answered by
25
^_^
Hey given that :-
3x + 5y = 9 ------( i )
and
5x +3y = 7 -------( ii )
multiplying eq ( i ) with 3 , and eq ( ii ) with 5 , we get
9x + 15y = 27
25x + 15y = 35
Now ,subtract both eq
9x + 15 y - 25x - 15y = 27 - 35
=> -16x = -8
=> x = 1 / 2
Now ,
3/ 2 + 5y = 9
=> 5y = 9 - 3/2
=> 5y = 15/2
=> y = 3/2 .
^_^
Hey given that :-
3x + 5y = 9 ------( i )
and
5x +3y = 7 -------( ii )
multiplying eq ( i ) with 3 , and eq ( ii ) with 5 , we get
9x + 15y = 27
25x + 15y = 35
Now ,subtract both eq
9x + 15 y - 25x - 15y = 27 - 35
=> -16x = -8
=> x = 1 / 2
Now ,
3/ 2 + 5y = 9
=> 5y = 9 - 3/2
=> 5y = 15/2
=> y = 3/2 .
^_^
aniketpradhan60:
x+y is asked....... u should simply added it and common out 8 .....x+y = 2 u will get!!
Answered by
19
x+y=2..................
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