- :- ()(. ) ()(. . .. )

:- :- :- :- :- :- :- :- :- :- :-:-:-

, \ :- x,y,z etc :- 2,4,5,8 etc :- ax+by=c

:- | :- | :- \ :- \

:- :- :- :- :- :-

:-

2x+3y=6

4x+6y=24X-303y420

X036y420

4x+6y=242x+3y=6

:-

:-

x+y=7,x-y=1 ? :- :- :- x+y=7 -----------------------------(1) x-y=1 ------------------------------() () x , x+y =7 x =7-y --------------------------- (3) (3) x () , (7-y)-y =1 7-y-y =1 7-2y =1 -2y =1-7 -2y =-6 y = -6/-2 y = 3 (3) y , x = 7-3 x = 4: x=4, y=3

:-

:-

x+y=7,x-y=1 ? :- :- :- x+y=7 -----------------------------(1) x-y=1 ------------------------------() (1x1)-(-1x7) X = (1x1)-(-1x1) X = 1+7 1+1 X = 8/2 X = 4 Y = 3

:-

:-

(1) x+y=7,x-y=1 ?(2) 100 | ?(3) x+y=7,x-y=1 ?(4) x+y=7,x-y=1 ?

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