Question

117x+231y=579,231x+117y=465

Answer 1

What should we do with this ?!

Answer 2

your answer is :-
for 1st equation :-
117x+231y=579. -(1)
for 2nd equation:-
231x+117y=465. -(2)

Adding both equations (1) and (2):-
equation 1:-117x+231y=579
equation 2:-231x+117y=465
=>348x+348y=1044
=>x+y=1044/348=3
=>x+y=3 -(3)
equation 3:- x+y=3
Subtraction both equations (1) and (2):-
equation 1:-117x+231y=579
equation 2:--231x-117y=-465
=>-114x+114y=114
=>-x+y=144/144=1
=>-x+y=1 -(4)
equation 4:- -x+y=1

On Solving equation 3 and 4 we get :-
x=1
y=2


hope this is helpful......☺☺☺☺☺☺☺☺