Odpowiedzi

2010-02-22T20:11:42+01:00
Y-x=3
2x+3y=4
y=3+x
2x+3(3+x)=4
2x+3x+9=4
5x=-5/:5
x=-1
y=3+(-1)=3-1=2
2010-02-22T20:11:47+01:00
Y - x = 3 /×2
2x + 3y = 4

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

y+3y+2x-2x=3+4
4y=7 /÷4
y = ½