Odpowiedzi

2009-09-20T17:17:57+02:00
2x+3y=4
-3y+x=6 /*(-2)
-2x+6y=-12

2/7x+5y=0 /*7/2
x+35/2y=0
-4/7-x=1
1 5 1
2009-09-20T17:19:33+02:00
A)
2x - (-3)y = 4
-3y +x= 6

2x+3y=4
x-3y=6

b)
2/7x + 5y = 0
-4/7 - x = 1 / *5

2/7x+5y=0
-20/7-5y=5.
:)
  • Użytkownik Zadane
2009-09-20T17:42:13+02:00
A) niewiadomej x
2x - (-3)y = 4
-3y +x= 6

2x+y=4
x-3y=4 /*(-2)

2x+y=4
-2x+6y=-8