Question

plese solve any meyhod

Answer 1

5x + 7y=50 -----------------eq. 1
and,
7x + 5y=4 6------------------- eq.2

after multiplying by 5 in eq. 1,

5 ( 5x + 7y)=50×5

25x + 35y=250----------------------eq. 3

and,after multiplying by 7 in eq.2

7 ( 7x + 5y)=4 6 × 7

4 9x + 35y =322---------------eq.4

subtracting qu. 3 from eq.4,

4 9x + 35y =322
-25x - 35y =-250
-------------------------
24x=72

x= 72/24

x= 3.

After putting the value of x in eq. 1,we get,

5x + 7y=50

5× 3 + 7y=50

15 + 7y=50

7y=50- 15

7y= 35

y= 35/7

y=5.


so the value of x= 3and y=5.