Odpowiedzi

2010-01-14T19:37:58+01:00
A) x + 2y = -13 / *2
2x+4y=-26

b) 3x + y = -5 / :3
x + ⅓y= -5/3 /*2
2x+ ⅔y= -10/3

c) - x + 4y = 2 /* -2
2x -8y = -4

d) x - ½y = 1 /*2
2x - y =2

e) 3x - 3y = 1 / :3
x-y = ⅓ / *2
2x-2y= ⅔


f) x + 3/4y = 0 / *2
2x + (3/2)y=0
67 4 67