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  • Użytkownik Zadane
2009-12-06T21:17:57+01:00
2x-3y =10/*5
5x+5y =0 /*3

10x -15y =50
15x+15y=0

25x=50 /25
x=2
15*2+15y=0
15y=-30/ 15
y=-2
5 3 5
2009-12-06T21:21:29+01:00
2x-3y=10
5x+5y=0

2x-3y=10
5x=-5y :5

2x-3y=10
x=-y

2(-y)-3y=10
x=-y

-2y-3y=10
x=-y

-5y=10:(-5)
x=-y

y=-2
x=-y

y=-2
x=-(-2)

y=-2
x=2

2 4 2